Local food sales and point of sale priming: evidence from a supermarket field experiment

Ružica Brečić (Department of Marketing, Faculty of Economics and Business, University of Zagreb, Zagreb, Croatia)
Dubravka Sinčić Ćorić (Department of Marketing, Faculty of Economics and Business, University of Zagreb, Zagreb, Croatia)
Andrea Lučić (Department of Marketing, Faculty of Economics and Business, University of Zagreb, Zagreb, Croatia)
Matthew Gorton (Newcastle University Business School, Newcastle University, Newcastle upon Tyne, UK)
Jelena Filipović (Faculty of Economics, Univerzitet u Beogradu, Beograd, Serbia)

European Journal of Marketing

ISSN: 0309-0566

Article publication date: 7 April 2021

Issue publication date: 17 December 2021




An intention-behavior gap often occurs for socially responsible consumption, where despite positive consumer attitudes, sales remain disappointing. This paper aims to test the ability of in-store priming to increase sales of local foods vis-à-vis imported, cheaper equivalents.


Laboratory and field experiments in three countries (Croatia, Slovenia and Serbia), working with an international grocery retailer, assess the ability of textual and pictorial-based point of sale (PoS) materials to increase the purchase of local foods. Field sales data, for the purchase of local apples and cherries and their imported equivalents, are complemented by an analysis of loyalty card transactions.


Field data indicate that both pictorial and textual PoS materials, significantly increase the likelihood of purchasing local foods, against cheaper imported equivalents. Pictorial PoS materials appear more effective than textual equivalents. Laboratory study data indicate that PoS materials increase the salience of goal consistent mechanisms in decision-making at the expense of mechanisms to achieve non-primed goals.

Research limitations/implications

The field experiment lasted for only two weeks and focused on seasonal produce.

Practical implications

PoS materials offer a low cost intervention for modifying consumer behavior in stores.


The paper develops a theory regarding how priming works and its application in a supermarket setting. This is investigated and validated in the context of local foods. The study offers encouragement for the usefulness of other in-store primes, such as relating to diet, to improve socially desirable outcomes without economic incentives or coercion and in a cost-effective manner.



Brečić, R., Sinčić Ćorić, D., Lučić, A., Gorton, M. and Filipović, J. (2021), "Local food sales and point of sale priming: evidence from a supermarket field experiment", European Journal of Marketing, Vol. 55 No. 13, pp. 41-62. https://doi.org/10.1108/EJM-07-2019-0604



Emerald Publishing Limited

Copyright © 2021, Ružica Brečić, Dubravka Sinčić Ćorić, Andrea Lučić, Matthew Gorton and Jelena Filipovic.


Published by Emerald Publishing Limited. This article is published under the Creative Commons Attribution (CC BY 4.0) licence. Anyone may reproduce, distribute, translate and create derivative works of this article (for both commercial and non-commercial purposes), subject to full attribution to the original publication and authors. The full terms of this licence may be seen at http://creativecommons.org/licences/by/4.0/legalcode


Recent years witnessed a growing interest in ethical consumption – “consumption activities that are consistent with conscience, values and morals” (Reczek and Irwin, 2015, p. 507). Greater numbers of consumers, particularly young adults, identify that they value ethical and socially responsible perspectives in their buying decisions (Andrews et al., 2014) and survey and experimental evidence point toward strong support for more environmentally friendly and socially/ethically responsible foods (Van Loo et al., 2014; Leonidou and Leonidou, 2011). However, a substantial intention-behavior gap exists between self-reported preferences for socially/ethically responsible products and their sales (Campbell and Fairhurst, 2016; Carrington et al., 2010; Carrington et al., 2014). For instance, FUTERRA (2005) reports that while 30% of consumers state they would purchase “ethically,” only 3% actually do so. Developing and verifying strategies to reduce intention-behavior gaps for socially/ethically responsible purchases is an important objective for academics and practitioners working in green and cause-related marketing (Carrington et al., 2014; Govind et al., 2019). This paper addresses this objective by investigating the effectiveness of textual and pictorial-based point of sale (PoS) primes for reducing intention-behavior gaps, considering the case of local foods in supermarkets.

Extant literature identifies several reasons for intention-behavior gaps. As part of their integrated model of behavioral prediction, Fishbein and Yzer (2003) argue that while intentions are the best predictor of behavior, the latter also depends on the presence of environmental constraints and necessary skills. Recent work also considers self-control failures, which are important in explaining differences across individuals in their likelihood to enact behavioral intentions (Rogers and Milkman, 2016). However, two other important factors as to why intentions go unexecuted are that people simply forget to do what they intended (memory lapses) and, second, individuals have multiple, often competing, goals, which may “crowd out” or override the achievement of others in a particular context and time period (Carrington et al., 2014; Corradi et al., 2013; Lagerkvist and Okello, 2016; Shah and Kruglanski, 2003).

Memory lapses may lead to an intention-behavior gap even for activities deemed important, beneficial and easy to perform. For instance, research with women who intended but had not performed breast self-examinations to check for signs of cancer revealed that for 70% the primary reason was that they forgot (Orbell et al., 1997). Regarding crowding out, previous research establishes that ethical values must be salient at the point of purchase to affect action e.g. selecting one offering from completing alternates (Verplanken and Holland, 2002). Consumers typically seek to accomplish multiple goals (helping others and frugality), which often involve trade-offs when making purchase decisions e.g. an “ethical” offering may be more expensive. The nature of the environment in which decision-making occurs influences how consumers resolve trade-offs (Carrington et al., 2010), so, for example, thrift-based environmental primes increase the probability of consumers choosing value-based products (Laran et al., 2011), while prestige cues reverse the effect (Chartrand et al., 2008). In a supermarket shopping environment, price and price-related primes are typically ubiquitous (Lichtenstein et al., 1993). In this context, frugality as a goal may take precedence over ethicality, even if ethical values matter to the consumer, as the activation of money saving goals in a retail shopping environment is far stronger (Reczek and Irwin, 2015; Chartrand et al., 2008). Consequently, the goal of saving money may crowd out intentions to purchase ethically/socially responsible goods in a typical retail environment, as in the absence of goal-activating stimuli, ethical goals remain “out of sight, out of mind” (Shah and Kruglanski, 2003).

The importance of memory lapses and the ubiquity of price-based cues activating money-saving goals in supermarket environments suggests a potential role for aide-mémoire priming – stimuli that remind individuals of an existing goal to purchase ethically/socially responsible goods. Such primes can aid goal accomplishment by helping individuals keep their “eye of the prize” in the context of competing demands on attention and effort (Shah and Kruglanski, 2003). This could be, as investigated here, in the form of PoS materials, which remind shoppers of specific goals in a retail environment. So, the question becomes to what extent can non-price-based environmental primes reduce the intention-behavior gap for more ethically/socially responsible purchases?

This paper investigates the effectiveness of textual and pictorial-based primes for increasing sales of local foods in a supermarket context. Local foods are a form of ethical consumption as moral and personal beliefs underpin choices, albeit in combination with egoistic concerns (Birch et al., 2018). Specifically, moral and personal beliefs relating to supporting local farmers, food producers and territories are integral to the appeal of local foods (Megicks et al., 2012). After laboratory testing, we conducted a field experiment with an international grocery retailer in supermarkets across three countries (Croatia, Serbia and Slovenia). For Croatia, sales data are supplemented with an analysis of loyalty card transactions to better understand, which market segments are more likely to respond to priming.

The paper contributes on two main grounds. First, we introduce priming as a mechanism for reducing the intention-behavior gap for more ethically/socially responsible purchasing. We develop a theory as to how it may work in a retail setting, leading to a set of hypotheses for testing. Whilst a substantial literature on priming effects exists, demonstrating how objects and props can create distinct contexts and exert unconscious effects on behavior (Cadario and Chandon, 2020; Chartrand et al., 2008; Sela and Shiv, 2009; Weingarten et al., 2016), this is largely limited to laboratory and restaurant/canteen environments, leading to calls that “precedence should be given to testing interventions in grocery stores and outside the US,” with greater attention to reporting effects for different segments and sub-groups of the population (Cadario and Chandon, 2020, p. 468). Chabris et al. (2019) argue that the priming literature is too dependent on small samples and laboratory-based studies, which typically consider the effect of a single type of prime in isolation. In store, shoppers face a multitude of primes, overwhelmingly focused on price considerations (discounts, sale signs etc). and previous research fails to consider whether PoS materials, priming non-price-based norms, can be effective and with whom in such an environment. For retailers, this is of practical importance (Wansink, 2017).

Second, we investigate priming in the context of local foods. There is growing consumer, retailer and policy interest in the sale of local and regional foods (Yang et al., 2020), which may stimulate economic development, particularly in rural economies characterized by low incomes and outmigration (Kneafsey, 2012; Barlagne et al., 2015; Arfini, 2019). This is true of South-eastern Europe, where the field experiment occurred, which possesses large numbers of small-scale farms. Previous survey work in Western Europe and North America identifies a sizable group of consumers who value the localization of food production and claim that they are willing to pay extra for it (Weatherell et al., 2003; Tregear and Ness, 2005; Chambers et al., 2007; Onozaka and McFadden, 2011; Abrams and Soukup, 2017; Toler et al., 2009), a finding also replicated in the region of study (Barjolle et al., 2013). However, local produce linked to a specific geographical origin (region and country) typically lacks cost competitiveness compared with generic versions, which can be sourced from numerous territories. This leads to multiple retailers being reluctant to stock local products, citing insufficient demand (Feldmann and Hamm, 2015). Where available, sales of local foods are lower than forecasted based on consumer surveys, suggesting a substantial intention-behavior gap (Campbell and Fairhurst, 2016; MINTEL, 2013). However, as noted by Abrams and Soukup (2017), there is a paucity of communications research on local foods, with few attempts to manipulate labeling and promotional materials. Accordingly, they call for further research using field experiments to gain “a better understanding of local food messaging” and its effectiveness (Abrams and Soukup, 2017 p. 14).

Local foods

There is no universally accepted definition of a local food (Martinez et al., 2010). Most approaches consider the geographical distance between the point of production and consumption (e.g. 30 miles or 50 km) or that which is produced and consumed within a specific political entity such as a state, region or country (Racine et al., 2013; Bingen et al., 2011). For instance, the 2008 US Farm Act defines a local food as that which is sold within 400 miles of its origin or within the State in which it is produced (Martinez et al., 2010).

Previous work maps consumers’ attitudes regarding local foods. Older (Megicks et al., 2012; Weatherell et al., 2003), richer (Brown et al., 2009), rurally located (Racine et al., 2013; Megicks et al., 2012) and female (Megicks et al., 2012; Weatherell et al., 2003) consumers typically hold more favorable attitudes to local foods. While meaning different things to different people, local food embodies a values-based consumer awareness and decision-making (Bingen et al., 2011). Prior research identifies two broad sets of motives. Intrinsic motivations reflect a perceived superiority in terms of sensory properties, especially freshness and health benefits (Weatherell et al., 2003; Megicks et al., 2012; Chambers et al., 2007). Extrinsic motivations, in contrast, refer to wider concerns connected with supporting local economies, especially farmers (Toler et al., 2009), the environment and community cohesion, which “go beyond the act of eating” (Bingen et al., 2011). Generally, intrinsic motivations are of greater salience in food choice than civic factors (Weatherell et al., 2003; Megicks et al., 2012).

While attitudes toward, and stated intentions to consume, local foods are typically favorable (Megicks et al., 2012), its share of total food purchases remains low (Chambers et al., 2007; MINTEL, 2013). In respect to this gap, McEachern et al. (2010) argues that consumers of local foods are also flexible consumers – so that ethical concerns have to fit with the achievement of other goals relating to time, price and convenience. These are often in conflict and not resolved consistently, so that behavior can be unpredictable and heavily context-dependent. Tregear and Ness (2005) draw a similar conclusion, noting that the importance ratings of price and intrinsic quality attributes do not differ significantly according to the level of interest in local food, implying that even those with the most favorable outlook have other, important expectations that lead to pragmatic decision-making. In this regard, local foods are similar to other forms of ethical food consumption (Reczek and Irwin, 2015; Van Doorn and Verhoef, 2015).


Priming refers to the activation of mental constructs and behavioral concepts, through supraliminal or subliminal means, via perception of external stimuli (Weingarten et al., 2016). The effect of primes may occur in multiple ways. The simplest mechanism involves primes directing individuals’ attention consciously to previously formed goals (Shah and Kruglanski, 2003). For instance, reminder systems, be it computer generated automatic cues or manually derived ones, boost take-up of health screening and other preventative services (Zapata et al., 2018). However, goal constructs can be activated in memory without conscious guidance were associated with a particular cue (stimulus-response conditioning). Once a goal is activated, strategies associated with that goal are also activated and direct subsequent behavior (Chartrand et al., 2008; Bargh, 2017; Shah and Kruglanski, 2003). Brands and other commercial stimuli can activate goals outside of conscious awareness (Fransen et al., 2008). For instance, subliminally priming a retail brand associated with thrift (Wal-Mart) led consumers to behave in ways consistent with the related goal, selecting value-based options over more prestigious alternates (Chartrand et al., 2008). Similarly, video-game players when driving a Red Bull branded car drove faster but more recklessly than in other branded cars (e.g. Tropicana and Coca-Cola), without participants’ awareness (Brasel and Gips, 2011).

Central to theories of priming is the notion that goals are represented in mental structures, which include the positive valence of an associated state (Custers and Aarts, 2005; Custers and Aarts, 2010). Consequently, goal representation not only specifies the desired state but also its desirability. Non-conscious operation of a behavioral goal, therefore, depends on whether positive affect is linked to the mental representation of the respective state, which when present automatically signals that the state is worth pursuing (Custers and Aarts, 2005; Veltkamp et al., 2011). Primed goals affect motivation outside of awareness because the mental representation of goals is positive and priming such goals activates a positive affective tag, which operates as a reward signal (Custers and Aarts, 2010; Veltkamp et al., 2011).

Given this theoretical framework, we expect PoS material promoting local foods to increase their sales, among a population predisposed to local foods, through two mechanisms. First, consciously, as a reminder directing attention to previously formed goals (Shah and Kruglanski, 2003). PoS materials in store should be particularly effective as an aide-mémoire, as they are encountered when consumers make purchasing decisions, and thus, when previously formed intentions can be enacted (Rogers and Milkman, 2016; Austin et al., 2006). Second, viewing of PoS material can lead to non-conscious activation of a positively assessed goal, stimulating choices consistent with the primed concept (Custers and Aarts, 2010). Given that priming occurs in store, an individual’s ability to makes choices consistent with an activated goal is high and almost instantaneous, so that the possibility of goal fulfillment is high and quick (Sela and Shiv, 2009). Consequently, we expect that:


Choice of a product linked to a behavioral goal will be higher in the presence of PoS materials promoting that goal.

Several accounts of the mechanisms underlying priming effects exist, with recent theory focusing on the role of activated motivational constructs (Fitzsimons et al., 2008; Weingarten et al., 2016). According to the latter, goals can be activated by environmental stimuli (situational cues) either consciously or non-consciously and goals are desired states that individuals wish to attain (Custers and Aarts, 2010; Shah and Kruglanski, 2003). For instance, those exposed unobtrusively to words invoking prestige goals are more likely to select, in a lab experiment, higher priced, Nike branded socks than those in a thrift-condition control group (Chartrand et al., 2008). Such effects occur because activated goals cause ways to achieve such a goal to become more accessible (Fitzsimons et al., 2008; Shah et al., 2002). Consequently, goal activation leads to the means to achieving that goal to become active (Fitzsimons et al., 2008). Priming, however, only works where it is congruent with an individual’s current goals. For instance, priming a drink’s brand name increases its selection and fluid intake but only for those who are thirsty (Karremans et al., 2006). Priming local foods will only thus, affect sales among those predisposed to them and, for instance, among highly neophobic consumers, primes for foods alien to their culture are likely to be ineffective.

In the case of PoS priming, we expect that the goals primed in the display to become active among those predisposed to the goal, so that mechanisms to achieve that goal also consequently become active. This increases their salience in decision-making. While, consumers typically possess multiple, often competing goals, their salience at the point of decision-making varies. Priming one goal increases its salience and typically comes at the expense of a quest to reconcile multiple, competing other goals (Kopetz et al., 2012). In other words, the salience of the primed goal increases at the expense of non-primed goals. For instance, among consumers who seek both food enjoyment and weight control, when the former goal is experimentally heightened, participants select more foods that are instrumental to that goal regardless of caloric content (Study 4, Köpetz et al., 2011). Heightening the food enjoyment goal, crowded out the weight control motivation. In the case of local foods, priming the goal of supporting domestic farmers and producers, should activate mechanisms to achieve this goal (buying local foods) at the expense of non-primed goals such as frugality. Consequently, we expect that:


PoS materials priming a particular goal, activate mechanisms to achieve that goal, increasing the salience of goal consistent mechanisms in decision-making at the expense of mechanisms to achieve non-primed goals.

Construal level theory (CLT) explains how individuals mentally construe objects that are psychologically near in terms of low‐level, concrete and contextualized features, but use abstract, high level construals for comprehending psychological distant objects or events (Trope et al., 2007). Research indicates that advertising messages are more effective when they evoke construal levels that are congruent with viewers’ psychological distance (Martin et al., 2009). Psychological distance has several dimensions including space, time and social distance (Hernandez et al., 2015). For instance, regarding time, message elements should be consistent with purchase time frames, so that immediate purchases should be matched with concrete, attribute specific information and guarantees (Jin and He, 2013).

Pictures convey referent objects, impart a sense of proximity and invoke concrete perceptions, while words invoke the “abstract essence of referent objects” (Choi et al., 2019, p. 530). Consequently, pictures should match psychologically close objects and text congruent with psychologically distant ones (Trope et al., 2007). Empirical evidence is consistent – pictures are more persuasive for proximal consumption events, while text is preferable for distant consumption events (Choi et al., 2019; Lee et al., 2009). Using advertisements of fruit and furniture, Choi et al. (2019) found that pictures evoke more favorable attitudes to the brand and purchase intention for non-durable goods for immediate consumption (fruit) but that textual-based advertisements elicit more favorable responses for durable goods where psychological distance is greater (furniture). While there is an absence of previous studies comparing textual and pictorial PoS materials, based on CLT and related empirical evidence for fruit advertisements it is assumed that:


For psychologically close objects, congruent pictorial-based PoS materials are more effective at increasing sales than textual-based PoS materials.


The pre-experimental phase included an in-store intercept survey, qualitative research and pre-test. The intercept survey involved food shoppers in-store in Croatia (n =96), Serbia (n =101) and Slovenia (n =108). Shoppers were intercepted at random and of those approached, approximately 40% refused to participate with the most common reason given being insufficient time. The in-store survey sought to check shoppers’ degree of support for buying local foods. On a seven-point scale, where 1 = equals strongly disagree and 7 = strongly agree, respondents indicated their degree of support for the statements “buying local produce is a significant cause” (mean = 5.95), “buying local produce is important to me” (mean = 5.74) and “buying local produce will benefit farmers” (mean = 6.25). Taken together the results indicate positive consumer attitudes toward local food across the three countries studied, albeit with stronger support in Croatia and Slovenia than Serbia. For instance, regarding “buying local produce is a significant cause,” the mean scores for Croatia, Serbia and Slovenia were 5.94, 5.52 and 6.36, respectively (F =8.677, p =0.000). Serbia has lower average incomes and a significantly higher proportion of the population living in poverty, based on national poverty lines.

To generate further insights, we conducted two focus groups. Focus group 1 consisted of eight women, aged between 28 and 42 years of age, 6 of whom had children. Focus group 2 consisted of 8 women, aged between 28 and 52, 6 of whom had children. All were: used (with a mix of occupations e.g. nurse, teacher, lawyer and entrepreneur), the primary food shopper in their household, and purchased fresh fruits regularly. The focus groups occurred in Zagreb (capital of Croatia). The focus groups addressed four main issues, namely, patterns of fresh fruit purchases and consumption, the motivations affecting fruit purchases, how shoppers make judgments regarding fresh fruit quality and what they look for in-store and understanding of the term “local food” and its associations. Discussions were recorded and transcripts subject to thematic analysis (Braun et al., 2019). The focus groups established that Croatians perceive local as applying to the whole country, rather than a specific region or sub-territory. This reflects the relatively small size of the country and the predominance of national over (sub)regional identities – a pattern, which also holds for Slovenia and Serbia. When discussing local, participants implied the country rather than a particular village, town or region and this conceptualization informed the empirical research.

Three salient motivations for buying local produce emerged, namely, perceived superior quality (freshness and taste), health benefits and to support the country’s farmers. These are consistent with the intrinsic and extrinsic motivations identified in the literature (Bingen et al., 2011; Weatherell et al., 2003). Participants believed local fruits to be fresher, and therefore, more nutritious and “natural,” delivering health benefits, as well as tastier. However, several participants also discussed an ethical dimension, believing buying local was morally right, to support the livelihood of fellow citizens “because there is a problem because most young people moved because they cannot find work […] when I decide to buy I always prefer to buy something from a local manufacturer.” As another noted, this may override the consideration of intrinsic attributes: “I will always buy a Croatian product, not because it is healthier or better but because it is Croatian.”

The intercept survey and focus group findings served as a starting point for the development of in-store materials. We appointed a professional marketing agency to develop two types of in-store PoS promotional materials. The first type included photographs and the second group consisted of textual messages emphasizing the potential benefits of buying local food in line with the focus group findings. The potential PoS materials were pre-tested for appeal and perceived understanding, via an on-line self-administered questionnaire (n = 58) in which respondents rated specific images and textual messages. The results of the survey informed the decision on which photograph, and specific textual messages were used in the in-store experiment. The finalized pictorial-based PoS material consisted of a young, male farmer with a basket full of fresh fruits and vegetables, and a small photograph of the relevant national flag in the corner of the photo. The online survey responses for the selected photograph, on a five-point Likert scale (1 = strongly disagree and 5 = strongly agree), yielded mean scores of 4.29, 4.03 and 4.19 for the statements “this image is appropriate for the promotion of fruits and vegetables,” “this image is useful” and “I like this message,” respectively. The textual PoS material consisted of three messages, namely, I buy local; I buy it fresher; I support the local farmer. These were the three highest-rated messages (mean scores of 4.05, 4.10 and 4.10) and consistent with the focus group findings. This suggests that the materials are effective and communicate intended meanings. Appendix details the sample PoS materials and a picture illustrating their application in-store.

A final pre-test, following Mandel and Johnson (2002), checked message equivalence in goal activation between the textual and pictorial PoS materials. In total, 186 students at a Croatian university were randomly assigned to view either the textual (n = 85) or pictorial (n = 101) PoS materials (as displayed in Appendix), which were embedded within a Qualtrics hosted survey. After viewing materials, participants were asked what comes to mind when considering buying fruit and vegetables, with space for four, free text answers. In the case of the text-based prime, 64.7% mentioned origin or domestic as a consideration, while for the pictorial-based prime group the equivalent figure was 62.4% (X2 = 0.762, p = 0.431). This indicates no significant differences between the text and pictorial-based primes in terms of their ability to induce thinking regarding origin and the domestic economy (message equivalence regarding local/origin goal activation).

In summary, the pre-test phase established that consumers in the investigated countries possess a positive attitude toward local food, with the appeal based on perceived superior quality (freshness and taste), health benefits and a desire to supporting the country’s farmers. We now turn to Studies 1 and 2, which focus on fresh apples and cherries. We selected these products because they are, namely, mainstream foods, readily available from both domestic and foreign producers for the same variety, and highly perishable. The latter implies little opportunity for hoarding so that consumers’ purchase behavior reflects immediate preferences rather than a desire to stockpile (Ballings et al., 2018).

Study 1a

Study 1a provides an initial test of the ability of PoS materials to stimulate the choice of local foods, by increasing the salience of goal consistent mechanisms in decision-making at the expense of mechanisms to achieve non-primed goals.

Design and procedure

Within a computer lab setting, 153 undergraduate students at a Croatian university were randomly assigned into one of the three groups, namely, no prime (n = 51), textual prime (n = 50) and pictorial prime (n = 52). After an introduction, subjects viewed either the no, textual or pictorial primes (as displayed in Appendix) before being asked to imagine that they were in a supermarket and wished to purchase apples. They were told that for a specific variety of apples, there were two options, namely, Croatian apples, which cost 10 kuna (circa €1.35) per kilogram and Polish apples, which cost 7 Kuna per kilogram (circa €0.95). Subjects were asked to make a choice between the Croatian or Polish apples or select neither. After making a choice, subjects rated the certainty of their choice on a sliding scale (0 = not very certain and 100 = very certain). Immediately after the choice, subjects reported the extent to which particular goals were in their mind when making the choice between apples (1 = not considered at all in decision, 7 = most important factor in the decision).

Results and discussion

A greater proportion of subjects in the textual (74%) and pictorial (63.5%) prime groups chose local apples, compared to the no prime (51%) control group (X2 = 5.741, p =0.057), supporting H1. There are no significant differences between the pictorial, textual and control groups in terms of the certainty of decision (F =1.528, p =0.220). Consistent with H2, significant differences across the groups are apparent in terms of subjects’ rating of the importance of particular goals in their mind when making a choice (Table 1). Specifically, the rating of local origin and well-being of local farmers is higher in textual and pictorial prime groups compared to the non-primed control group. In contrast, those in the non-primed group rated price as being of greater salience in their choice decision than those in the textual and pictorial prime groups.

A comparison of the word and pictorial prime groups indicates no significant differences in mean scores, apart from in the case of price, where the pictorial prime appears more effective in decreasing its salience (t =1.941, p =0.055). Comparing the no prime and pictorial groups indicates significant differences in terms of the importance of price (t =1.941, p =0.055), local origin (t = −2.069, p = 0.041), health (t = −2.057, p = 0.042) and well-being of local farmers (t = −2.696, p =0.008) in the choice decision, but not freshness (t =−0.254, p =0.800). Comparing the control and textual groups, however, the only significant difference in terms of salience in decision-making relates to the well-being of local farmers (t =1.515, p =0.088). Yet, regarding the choice between Polish and Croatian apples, there are significant differences between the no prime and word (X2 = 8.396, p =0.015) and no prime and pictorial prime groups (X2 = 6.737, p =0.034). There are no significant differences between the textual and pictorial primes in terms of the likelihood of choosing the local option (X2 = 0.173 p =0.677).

In summary, Study 1a provides initial evidence that PoS priming affects consumer choice, supporting H1 and can change the salience of goal consistent mechanisms in decision-making, consistent with H2, at the expense of mechanisms to achieve non-primed goals (e.g. frugality). However, in a computer lab setting, we do not find support for H3 regarding the relative effectiveness of pictorial and textual-based PoS materials.

Study 1b

One concern is that the results of Study 1a might reflect specific country of origin (COO) effects. We, therefore, conducted a follow-up study using the descriptors local and imported for the apples instead of a specific COO (e.g. Croatia and Poland) [1].

Design and procedure

Participants were 240 different students from the same Croatian University as for Study 1a. Participants were randomly assigned to the no prime (n = 81) textual prime (n = 80) or pictorial prime condition (n = 80). Participants in the primed groups viewed the same primes as in the previous experiment, and again were asked to imagine that they were in a supermarket and wished to purchase apples. They were told that for a specific variety of apples, there were two options, namely, local apples costing 10 kuna (circa €1.35) per kilogram and imported apples costing 7 Kuna per kilogram (circa €0.95). Subjects were asked to choose between the local or imported apples or select neither. After making a choice, respondents completed a five-item scale of personal norms (Hosta and Zabkar, 2020), adapted to local foods (α = 0.893). In addition, to further enhance understanding of choices, respondents completed the five-item scale of Lichtenstein et al. (1993) to capture price consciousness (α = 0.902). Both scales were measured on seven-point Likert scales. The mean score on the personal norms scale in relation to local foods was 4.57, indicating that they are positively valenced. For instance, only 22.9% disagreed or strongly disagreed with the statement “I feel I have an ethical obligation to buy local products.”

Results and discussion

In contrast to Study 1a and H1, there was no significant difference between the three conditions regarding the likelihood of selecting the local option (X2 = 4.026, p =0.134). What is most striking about the pattern of choices is the difference in the no prime control group. In Study 1a, only 51 % of the control group selected the local food option but this increased to 68 % in Study 1b. Several reasons could explain this discrepancy. It could be that “imported” provides less certainty than Poland. For instance, “imported” could include countries with perceived poor food safety and also goods from Serbia for which some Croatians feel animosity (Brečić et al., 2013). These motives for import avoidance are not primed in the PoS materials developed. Second, Study 1b occurred during March/April 2020, when there was considerable disruption to food shopping behavior because of the Coronavirus crisis, with residents subject to lockdown restrictions. During this period the sentiment to help fellow Croatians in a time of crisis was widespread, with retailers running campaigns to support local producers and achieve self-sufficiency (Wynne-Jones, 2020). If buying local concerns are paramount in consumers’ minds, then aide-mémoire priming becomes superfluous.

To understand choices further, we ran a logistic regression model with choice as the dependent variable (1 = chose local; 0 = chose imported), and price consciousness and personal norms relating to local foods as independent variables, along with dummies for being exposed to the pictorial and textual primes (Table 2).

Table 2 indicates that price consciousness, as may be expected, decreases the likelihood of selecting the more expensive, local option. In contrast, personal norms related to local food strengthen the likelihood of selecting the local option, indicating that personal values affect the demand for local food. The textual primes, however, in Study 1b do not have a significant effect on consumer choice, while the pictorial one has a positive effect at the 10% level of significance only.

In summary, Study 1b advances understanding regarding the role of price consciousness and personal norms. However, we are unable to rule out the confound between a specific COO and local versus imported products generally. Differences in the control group’s choices between Studies1a and 1b lead to inconsistent results relating to H1 across the two studies. Recognizing the limitations of a computer lab-based setting, we now turn attention to the field experiment.

Study 2

Study 2 tests the effectiveness of PoS priming for local foods in a supermarket setting, using loyalty card data to consider differences across consumer segments.

Design and procedure

The field experiment occurred in three countries (Croatia, Slovenia and Serbia). We adapted PoS materials to the specific country with textual messages translated and back translated by bilingual speakers to ensure consistency. The experiment occurred in the stores of one of the largest grocery retail chains in South-eastern Europe. It sells significant quantities of both local and imported fruits, and the company estimates that it purchases more than 190,000 tons of fruits and vegetables per annum.

The experiment involved apples as a product category in all countries. In total, 18 stores were included in the field experiment for apples (6 per country comprising 2 Pictorial PoS, 2 Textual PoS and 2 control stores). The retailer recommended stores with similar sales and customer profiles for inclusion and the selected stores had the same format and size (supermarkets) within a country. To test that the results were not unique to this specific product, we also undertook the experiment with cherries in a further six stores in Croatia. In each store, local apples/cherries were sold physically juxtaposed to the imported ones, to ensure equal choice for consumers. The retail space devoted to local and imported apples/cherries was equal and uniform across all stores. The experiment ran for two weeks in all stores. Across all stores, the price of the imported apples was 9 Kuna (€1.21) per kilogram and for local apples 10 Kuna (€1.35) per kilogram, with prices set by the retailer. These are typical retail prices for such products. Imported apples came from Poland, which is the largest apple producer in Central and Eastern Europe. Poland is not subject to any widespread animosity in the three countries studied. Similar arrangements (e.g. price differential and import source) occurred for cherries in Croatia.

Care was taken to select retail stores of a similar size and location characteristics for inclusion in the experiment. For Croatia, where loyalty card data were available, we checked the profile characteristics of shoppers who frequented control and treatment stores (Table 3).

Table 3 reveals all the profile characteristics (fruit and vegetable expenditure patterns, age, gender, market segment weighting) were statistically indistinguishable between the control and treatment samples.


Sales data.

Table 4 summarizes unit sales data for apples and cherries, respectively, across the three store groups (no treatment, textual PoS and pictorial PoS). In all cases, the share of sales accounted for by the local version is higher where either the textual or pictorial-based PoS materials are present compared with the control group where the same products and prices were in store but without any PoS material. In the control group stores, imports account for approximately two-thirds of sales, although this varies across countries and is also higher for cherries compared to apples. The percentage share of sales accounted for by the local version is highest in the case of the pictorial-based PoS material. Noticeably, the market share of the local food option is lower in the field experiment compared against the hypothetical purchase scenarios in Studies 1a and 1b.

Loyalty card data.

We followed the approach of Gertler (2004) to evaluate the intervention, considering the effect of exposure to the textual and pictorial primes on the likelihood of purchasing the local food option. We estimated a logistic regression of the probability of purchasing the local food version, where purchasing the local version was coded = 1 and imported equivalent coded 0. The key independent variables were dummies indicating whether the individual was exposed to textual PoS or pictorial PoS materials. The lack of self-selection issues and the fact that the control and treatment samples are well-balanced in the observed characteristics imply that a simple comparison of mean outcomes will likely provide an unbiased estimate of priming impacts. However, the analysis also controlled for profile characteristics to reduce idiosyncratic variation and to improve the power of the estimates (Gertler, 2004). The specific variables included in the model were: average value of purchase of fresh fruit and vegetables in the previous year, age and gender of the loyalty card owner. The analysis draws on data for 6,051 loyalty card users.

We estimated the model for the full sample and for specific market segments. This reflects that the effect of priming may vary across consumer groups. Based on data mining, the retailer segments their loyalty card holders into six types, namely, just affordable (price the most important factor, a high share of discounted products), tasty and high quality (buy more expensive brands, a higher share of delicatessen goods and wines), moderate (medium-priced brands), fast and practical (high share of ready to eat products and quick preparation foods), traditional (high relative share of fresh meat and vegetables, above-average share of discounted products) and healthy (high share of fruit, vegetables and fish, Mediterranean cuisine). The retailer’s typology, thus derives from actual spending patterns, rather than stated preferences or an academic framework. Some cardholders because they are infrequent shoppers at the retailer are not classified into any segment. The results of the logistic regressions, reported in log odds, are presented in Table 5.

The estimates suggest that for the full sample shoppers exposed to the textual PoS material were 31.9% more likely than those in the control stores to purchase the local food version. Those exposed to the pictorial PoS material were 42.5% more likely than shoppers in the control stores to purchase the local food version. In both cases, the differences are statistically significant at the 5% significance level. The results thus, support H1 regarding the effect of PoS materials and H3 regarding the relative effectiveness of pictorial versus textual-based PoS materials.

The analysis was repeated for specific consumer segments. It is important to note that compared with the full sample analysis, statistical power declines due to fewer observations and the odds ratios cannot be directly compared across the models. In all cases, the odds estimates are above 1, indicating that exposure to textual and pictorial primes positively affects the likelihood of purchasing the local food version, however differences are not always statistically significant. Noticeably, in the just affordable segment, with a shopper profile consistent with low incomes, exposure to the textual PoS increases the likelihood of purchasing the local food option by 77.4% and when exposed to the pictorial PoS this group is over twice as likely to purchase the local food version than in the control stores without the PoS.

Two groups where priming appears less effective are the tasty and quality and fast and practical segments. The tasty and quality group has the highest propensity to purchase the local food option in the control scores compared against the rest of the sample (Table 6), so in this case, the benefits of local foods may already be salient in shoppers’ minds at the point of purchase, so the PoS materials are relatively less effective. The fast and practical segment also has a relatively high likelihood of purchasing the local version in the control stores and also purchases a higher proportion of convenience food, looking to minimize time in store. This group may be less likely to notice and process PoS materials, although we do not have observational data to evaluate this. The healthy segment is small, and, in this case, the pictorial PoS material is far more effective than textual PoS. For this group, the image of a healthy and strong young farmer may be particularly effective and be far more proximate than textual statements.

In summary, Study 2 provides support for H1 regarding the effect of PoS materials on consumer behavior and H3 regarding the relative effectiveness of pictorial versus textual-based PoS materials.


Ethical consumption involves:

[…] people purchasing and using products and resources according not only to the personal pleasures and values they provide but also to ideas of what is right and good, versus wrong and bad, in a moral sense (Starr, 2009, p. 916)

Local foods are a form of ethical consumption as their appeal in part rests on altruistic motivations and normative judgments regarding supporting local farmers and producers (Birch et al., 2018; Megicks et al., 2012). While interest in ethical and socially responsible products is growing (MINTEL, 2013), such goods may suffer from an intention-behavior gap in consumer behavior. As found in the differences between the percentage of shoppers selecting more expensive local apples in hypothetical lab experiments (Studies 1a and 1b) and a field experiment where consumers spend their own money (Study 2), the intention-behavior gap can be large.

As noted by Govind et al. (2019, p. 1195), “literature has identified but not explored much” reasons for the intention-behavior gap in ethical consumption, with a need to consider strategies to reduce the discrepancy. This paper contributes by drawing on priming theory to theorize the effectiveness of aide-mémoire priming at the point of decision-making. This recognizes that intentions may remain unacted due to memory lapses (simply forgetting to do what was intended) and competing goals “crowding out” or overriding the achievement of others in a particular context and time period (Rogers and Milkman, 2016). The field experiment reveals that priming goals can significantly increase the likelihood of purchasing products consistent with that behavioral goal. Study 1a contributes by demonstrating the mechanisms underpinning the effectiveness of aide-mémoire priming, namely, increasing the salience of goal consistent mechanisms in decision-making at the expense of means to achieve non-primed goals.

CLT suggests that advertising messages are more effective when they evoke construal levels that are congruent with viewers’ psychological distance (Martin et al., 2009), with pictures more persuasive for proximal consumption events, while text is preferable for distant consumption events (Choi et al., 2019; Lee et al., 2009). We advance knowledge by testing CLT theory in the context of retail primes and a field experiment for the first time. While both textual and pictorial primes are effective in the field, results are consistent with CLT in that pictures have a stronger effect for the proximal consumption event (fruit purchase in store). This has implications for the design of in-store marketing communications.

Finally, the paper contributes to the burgeoning literature on local foods, which calls for research to generate “a better understanding of local food messaging” and its effectiveness (Abrams and Soukup, 2017 p. 14). The results demonstrate, for the first time in a field experiment, that exposure to marketing materials in-store significantly affects the likelihood of purchasing local foods. Study 1a indicates that marketing materials may increase the salience of local origin and the well-being of local farmers in consumer choices and suppress price considerations. This is consistent with notions that consumers of local foods are flexible consumers (McEachern et al., 2010); with a range of goals, that may conflict and not be resolved consistently. Consequently, behavior is context-dependent (Bargh, 2017; Cadario and Chandon, 2020), and thus, amenable to influence from marketing materials where they promote goals with a positive valence.

Managerial implications

The research generates actionable insights for retailers and their suppliers, as well as those who wish to promote the demand for local foods. Study 2 demonstrates that PoS primes can increase sales of more expensive local foods in a supermarket environment. Inducing shoppers to trade up to more expensive local foods, even where they are positively regarded by consumers, is a major challenge (MINTEL, 2013). PoS materials can be effective in boosting demand.

The analysis identifies that the appeal of local foods varies significantly across consumer segments, with the likelihood of purchase higher among healthy, tasty and high quality and fast and practical segments compared against the just affordable group. Among the latter, either with or without priming the likelihood of purchase is lowest. However, priming still has a significant effect on the just affordable group’s likelihood of purchase. The descriptor of primes as nudges (Thaler and Sunstein, 2003), which can influence consumer behavior, but where outcomes depend on the starting position, appears particularly apt.

For retailers, PoS materials may be particularly effective primes as viewing occurs at the point at which purchases occur, reducing the chance of memory lapses and providing an almost instantaneous opportunity for individuals to makes choices consistent with an activated goal. Consequently, the possibility of goal fulfillment and the satisfaction it generates is strong and quick (Sela and Shiv, 2009). PoS materials have another advantage for retailers in that they are typically a low-cost investment, providing a means for improving demand for local food through a straightforward modification of the in-store shopping environment (Campbell and Fairhurst, 2016). While both pictorial and textual-based PoS materials are effective in-store, for proximal consumption events, such as purchasing fruit, pictures appear preferable.

The results provide insights as to when PoS materials should be deployed and will be most effective. For retailers, they will be most useful when seeking to promote a behavior, which is positively regarded by consumers, but the related behavioral goal is currently crowded out in purchase decision-making. They will be less effective where consumers already perform the desired behavior (such as with the tasty and high quality market segment) or where the desired behavioral goal is already prominent in consumer decision-making so that further PoS priming is superfluous (which may explain the results of Study 2b).

Finally, this paper focuses on local foods but the potential for PoS materials to influence other retail choices in a similar manner appears promising. In Western countries, facing a marked increase in obesity and other diet-related health problems, the ability to affect consumers’ purchases in a grocery store, where decisions shape the food consumption of several people over multiple days, is important (Wansink, 2017). Given estimates that the costs of treating ill health caused by obesity will reach $1.2tn globally by the year 2025 (World Obesity Federation, 2017) and the ineffectiveness of many conventional, preventative health campaigns (Kelly and Barker, 2016), low cost textual and visual PoS materials in-store may offer substantial benefits albeit only when consumers already possess health-oriented goals.

Limitations and further research

The study benefited from working with a retailer, intervening in a real shopping environment. While this aids external validity, it also involves commercial sensitivities. The researchers could not access data on the prices paid by the retailer for imported and local versions of fruits, so cannot estimate profitability. Access to loyalty card data was limited to transactions involving the purchase of the local and imported versions of fruits studied in the control and treatment stores. At the request of the retailer, we report the percentage of sales accounted for by the local and imported versions rather than absolute sales volumes.

Study 2 looks at effects on retail sales over a two-week period; a relatively short timeframe necessitated by the fact that the study deals with perishable and seasonal goods. It was not possible to procure both local and imported versions of the same product and hold prices constant over a longer time period. This curtails assessment of before and after effects. The use of less seasonal produce (e.g. cheese and hams) would more easily allow researchers to measure the post-intervention spillover effect on sales, although farmer-related imagery may be less successful for promoting local foods in these cases given greater intermediary processing.

While Study 1b provides insight into the roles of price consciousness and personal norms in motivating the selection of local foods, we are unable to rule out the confound between a specific COO and local versus imported products more generally. Future laboratory and field studies incorporating multiple COO conditions would help isolate specific COO effects from imports generally. Study 2 finds that pictorial-based PoS materials are more effective at increasing sales than textual-based ones for a psychologically close object (apples). To assess further, the applicability of CLT, researchers could analyze the effectiveness of pictorial versus textual priming also for psychologically more distant products in “local” contexts.

Finally, the research team had access to loyalty card data for transactions involving the purchase of local and imported apples and cherries with information on fruit and vegetable category expenditure. We had no access to data on the other items bought by shoppers. Future research would benefit from analyzing shopping basket data and measuring spill-over effects. Two competing theories warrant testing. On the one hand, one may expect that priming in-store a goal for, say, local products in relation to fruits to spill over to increasing the propensity to buy locally produced goods in other food categories, given the relatively short delay between priming and purchase decisions. However, lab-based research identifies the potential for goal-satiation following a goal-congruent choice (Chartrand et al., 2008). So, for example, following exposure to a health-related prime and selection of a healthy choice, consumers may feel able to reward themselves by opting for less healthy goods in subsequent choices. Paradoxically, a health-related prime at the beginning of a grocery shopping experience could, thus lead to, overall, the selection of a less healthy basket of goods. The validity of these two competing claims could be tested through retail field experiments, using health and local primes in treatment stores and analyzing their effect on the overall composition of shopping baskets.


The study uses lab and field experiments combined with an analysis of loyalty card transactions to understand the ability of PoS primes to increase sales of primed-related goods. In a real shopping environment, it finds that both pictorial and textual PoS materials can be effective in increasing sales of prime-related goods. Study 1a suggests this occurs by promoting the salience of primed-related behavioral goals in decision-making and suppressing the influence of non-primed behavioral goals. The results are encouraging regarding the utility of other in-store primes, such as relating to better diets, to achieve socially desirable outcomes without recourse to changes in economic incentives or coercion.


Images of point of sale materials

Figure A1.

Images of point of sale materials

Impact of priming on importance ratings given to goals post-choice decision (Study 1a)

Mean score for group
Importance of goal in mind when making a decision No prime Textual prime Pictorial prime F-test
Price 3.75 3.52 3.15 5.51***
Freshness 4.33 4.14 4.37 1.21
Local origin 3.04 3.20 3.50 2.31*
Health 3.88 3.96 4.25 2.12
Well-being of local farmers 2.59 2.96 3.21 3.93**

*p < 0.1, ** p < 0.05, *** p < 0.01

Logistic regression model for choice of local option (Study 1b)

Variable Β SE Wald Exp (b) Sig.
Intercept −0.255 0.736 0.120 0.775 0.729
Personal norms toward local food 0.431 0.128 11.412 1.538 0.001
Price consciousness −0.225 0.113 3.945 0.799 0.047
Picture prime 0.618 0.356 3.009 0.539 0.083
Textual prime 0.242 0.385 0.397 1.274 0.529

Dependent variable = chose local apples option

Descriptive statistics for treatment and control groups based on loyalty card data, available for Croatia only (Study 2)

Variable Treatment Control p-value for difference
Average weekly expenditure on fruit and vegetables per in previous year (Kuna) 21.71 21.69 0.989
Average quantity (kg) of fruit and vegetables bought in previous year (Kg) 2.838 2.753 0.700
Number of household members 1.981 1.882 0.981
Age (years) 56.10 57.07 0.980
Women (% of shoppers) 67.93 68.93 0.543
Just affordable segment % of total shoppers) 16.64 17.89 0.699
Healthy segment (% of total shoppers) 4.18 4.27 0.928
Traditional segment (% of total shoppers) 16.43 14.89 0.136
Tasty and high quality segment (% of total shoppers) 18.86 18.04 0.451

The p values in the third column are for the test of the hypothesis that the means of continuous variables in the treatment and control groups are the same and relate to Χ2 tests in the case of categorical variables

Sales data: purchase of local and imported apples (Study 2)

% of total sales Store type
Pictorial PoS Textual PoS No treatment
Local Imported Local Imported Local Imported
Croatia 56.41 43.59 43.48 56.52 33.80 66.20
Serbia 61.98 38.02 51.89 48.11 39.61 60.39
Slovenia 55.89 44.11 52.19 47.81 37.55 62.45
Croatia 69.22 30.78 32.00 68.00 24.53 75.47

Log odds estimates of the impact of exposure to textual and pictorial primes on probability of selecting local food version (Study 2)

Group Textual PoS Pictorial PoS
Full sample 1.319 (0.025) 1.425 (0.002)
Just affordable segment only 1.774 (0.053) 2.027 (0.028)
Healthy segment only 1.296 (0.643) 2.487 (0.043)
Fast and practical only 1.237 (0.458) 1.281 (0.332)
Moderate segment only 1.538 (0.138) 1.684 (0.054)
Tasty and quality segment only 1.309 (0.320) 1.152 (0.563)

The columns report the estimated log odds from the co-efficient n the dummy variables relating to whether the shopper was exposed to the textual or pictorial PoS materials compared against the control of no PoS. The p value for the hypothesis test that the estimated log odds is equal to 1 is reported in parentheses

Responsiveness to PoS materials based on consumer segment type (Study 2)

% buying local version
Retailer’s segment No treatment (%) Textual PoS (%) Pictorial PoS (%)
Fast and practical 33.6 38.8 38.5
Healthy 36.8 44.4 53.5
Just affordable 19.4 27.7 31.1
Moderate 28.2 37.6 39.8
Tasty and high quality 36.7 43.1 40.0
Traditional 26.7 33.1 32.2



We thank a referee for suggesting this.

Appendix. Point of sale materials

Figure A1


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This paper draws on research conducted as part of the Strength2Food project, which received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 678024.

Corresponding author

Ružica Brečić can be contacted at: rbrecic@efzg.hr

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