Benefits and challenges of wearable safety devices in the construction sector

Purpose – Construction organizations must maintain a productive workforce without sacrificing their health and safety. The global construction sector loses billions of dollars yearly to poor health and safety practices. This study aims to investigate benefits derivable from using wearable technologies to improve construction health and safety. The study also reports the challenges associated with adopting wearable technologies. Design/methodology/approach – The study adopted a quantitative design, administering close-ended questions to professionals in the Nigerian construction industry. The research data were analysed using descriptive and inferential statistics. Findings – The study found that the critical areas construction organizations can benefit from using WSDs include slips and trips, sensing environmental concerns, collision avoidance, falling from a high level and electrocution. However, key barriers preventing the organizations from adopting wearable technologies are related to cost, technology and human factors. Practical implications – The time and cost lost to H&S incidents in the Nigerian construction sector can be reduced by implementing the report of this study. Originality/value – Studies on WSDshave continuedto increasein developedcountries, but Nigeria isyet to experience a leap in the research area. This study provides insights into the Nigerian reality to provide directions for practice and theory.


Introduction
The construction sector is one of the most dangerous industries (Kamoli and Mahmud, 2022). Construction operations are risky, with a high accident and fatality record (Chan et al., 2016;. The number of accidents and fatalities in the industry is disproportionate to its workforce (International Labor Organization (ILO), 2018). It is among the highest compared to other industries (Umeokafor et al., 2022). The construction industry's injuries constituted 7% of non-fatal injuries and 14% of workplace deaths in the United Wearable safety devices in the construction sector States in 2018(US Bureau of Labor Statistics, 2019. Incidents in the Canadian construction industry constituted around 10% of lost-time claims and 20% of workplace fatalities over three years (Association of Workers Compensation Boards of Canada, 2020). Fifty-four thousand injuries were recorded each year in Great Britain, the second-highest number of injuries among all industries (Health and Safety Executive, 2019), which cost the British economy 1.2 billion pounds in 2017-18 (Health and Safety Executive, 2019). In three years (2014)(2015)(2016), occupational accidents in the Nigerian construction industry accounted for 39.24% of occupational accidents in every sector of the economy (Kamoli and Mahmud, 2022). Over the years, H&S incidents in Nigeria have influenced the productivity of the construction sector, making the sector to contribute only 4% to the gross domestic product (GDP) (Kamoli and Mahmud, 2022). Sixty thousand fatal accidents reportedly occur on construction sites worldwide yearly, equating to one fatal accident every 10 min (Chen and Luo, 2016). Due to these H&S incidents, 3.94% of global GDP is lost yearly (ILO, 2018). The current construction H&S statistics create a negative outlook for the industry and undermine contractors' H&S performance. The need for improvement has continued to trigger debates in academia and industry (Awolusi et al., 2018), which produces the publication of H&S research articles and H&S-based conferences. The industry has extensively used various training methods to provide practitioners with H&S information to mitigate the high rates of fatal and non-fatal workplace injuries (Namian et al., 2020). Traditional training systems and other H&S programs offered to construction practitioners still need to provide competitive H&S performance on construction projects (Loosemore and Malouf, 2019). Some of the H&S programs need to consider modern construction methods (Chan et al., 2016).
The construction sector is lately considering technological innovations as an alternative means of addressing its H&S challenges (Awolusi et al., 2018). The construction management and engineering literature are rife with the need to train and educate construction workers on using digital technologies to solve H&S challenges. One of these technologies is wearable safety devices (WSDs) (Ahn et al., 2019). WSDs are small wearables or accessories that workers can attach to their bodies to monitor their health and safety . The devices can be in the form of smartwatches and wristbands that integrate various sensors to monitor workers' H&S (Guo et al., 2017). Wearable safety technologies have proven to be effective in preventing musculoskeletal disorders, preventing falls, assessing physical workload and fatigue, assessing hazard identification skills and monitoring workers' mental status (Ahn et al., 2019). Despite the associated benefits, the technology is still new, particularly to construction organizations in developing countries. Therefore, challenges of adoption by construction organizations are inevitable.
Scholars in the field of construction have published research articles that address WSDs. Publications from the United States are the highest number of articles in the research domain (Choi et al., 2017;Hwang and Lee, 2017;Lee et al., 2017;Nath et al., 2017;Awolusi et al., 2018;Ahn et al., 2019;Bangaru et al., 2020;Okpala et al., 2021;Jeon and Cai, 2022). Publications have emanated from other developed countries, including Australia (Arabshahi et al., 2021b), China (Guo et al., 2017) and Slovenia (Kamisalic et al., 2018). In the construction industry, WSD research is still at an early stage, and there currently needs to be more studies in developing countries. Wearable safety technologies can be maximized to improve H&S in construction.
Despite the increasing interventions to improve construction H&S, Nigeria is still searching for more viable options (Okoye, 2018). Occupational hazards, risk assessment and control, risk management and techniques have been largely investigated in Nigerian construction (Odeyinka et al., 2004;Ijigah et al., 2013;Odimabo and Oduoza, 2013;Oranusi et al., 2014;Edmund, 2015). A few other studies address hazards through design (Umeokafor, 2017) and community roles in promoting construction H&S (Umeokafor, 2018). Some studies have focused on the general practice of safety management and accident prevention (Oreoluwa and Olasunkanmi, 2018). Although the recommendations from the existing studies are steps in the right direction, there is a need for more research on technology-based tools to overcome the H&S challenges in the Nigerian construction sector. Given that wearable safety technologies could improve accuracy in assessing and identifying risk factors (Conte et al., 2011), this study aims to investigate benefits derivable by Nigerian construction organizations from using WSDs and challenges that hamper the adoption of the technology.
Wearable safety devices research Although WSDs are useful H&S tools, their application in construction is still in its infancy compared to other industries .  examine the critical success factors influencing the implementation of WSDs for H&S monitoring in construction. The research reports critical success factors as contingent on the type of organization, organization size, and organization experience using WSDs. Key strategies to improve the implementation of WSDs include educating and training workers, promoting personalized WSDs, and conducting detailed and continuous assessments of WSDs. Abuwarda et al. (2022) examine ubiquitous WSDs suitable for the health and construction sectors. The study reports H&S metrics that could be measured using WSDs in both sectors. Specific devices, such as a chest sensor that records heart rate and its variability, are reported (Arabshahi et al., 2021a;Abuwarda et al., 2022). Bangaru et al. (2020) alluded to the use of sensors but argued that not all sensors could be used for construction applications. Bangaru et al. (2020) evaluate the data quality and reliability of forearm electromyography (EMG) and inertial measurement unit (IMU) wristband sensors for construction activity classification. The study's classification results conclude that the forearm-based EMG and IMU data can be used to generate reliable models for detecting construction activities. Awolusi et al. (2018) examine wearable applications in non-construction industries and highlight the potential of their integration into construction. Wearable safety devices in the construction sector Jeon and Cai (2022) demonstrate the act of coupling wearable electroencephalograms (EEGs), virtual reality (VR), and machine learning for workplace hazard detection. The study correlates EEG signal patterns with construction hazard types and develops an EEG classifier based on immersive VR experiments. Nath et al. (2017) studied the ergonomic analysis of the posture of construction workers using wearable mobile sensors. The study develops a low-cost, ubiquitous approach that uses built-in smartphone sensors to unobtrusively monitor workers' posture and autonomously identify potential work-related ergonomic risks. The authors proposed an approach beneficial to construction workers exposed to work-related musculoskeletal disorders due to poor posture. Although the study primarily focuses on postural analysis for trunk and shoulder flexion in a manual screwdriving task, the developed methodology and analysis techniques can be generalized to other field activities with minimal modifications. Arabshahi et al. (2021a) classified WSDs into physiological and integrated personal protective equipment (PPE) sensors. The study identifies common safety technologies and reports on the extent of their implementation. Choi et al. (2017) examine determinants of worker acceptance of wearable technology in the professional work context.  identified and evaluated the types of WSDs most preferred by field workers. Choi et al. (2017) found perceived usefulness, social influence, and perceived privacy risk associated with worker intent to adopt smart vests and wristbands. In order to mitigate resistance to WSDs adoption,  encourage managers that have used WSDs to share their experiences with their workers.

Benefits of using WSDs
This section reports the common benefits of WSDs. Physiological WSDs monitor emotional well-being, fatigue, physical workload, and posture recognition (Ahn et al., 2019). Wearable electroencephalograms (EEGs) are used to observe stress levels, mental exhaustion, and emotional states (Wang et al., 2017) by tracking and recording brain wave patterns. EEGs provide a basis for investigating and treating psychological problems in construction workers and help avoid unsafe behaviour (Arabshahi et al., 2021a). Besides, electrocardiograms (ECGs) are effective in chest sensors to monitor the heart rate of construction workers . Electrocardiogram, EEGs, and infrared temperature sensors have been integrated to monitor real-time physical fatigue in workers (Aryal et al., 2017). The spinal biomechanics of construction workers can be monitored by EMG by measuring the electrical activities of the muscles (Arabshahi et al., 2021a). EMG enhances the safety of construction workers exposed to repetitive lifting and tying of rebar (Antwi-Afari et al., 2017;Umer et al., 2017). Wristbandtype heart rate monitors detect significant fluctuations in exercise demands (Kamisalic et al., 2018;Hwang and Lee, 2017), estimate energy expenditure , and track heart rate (Hashiguchi et al., 2020).  found smartphone-based WSDs, smart hard hats, and smart safety vests to be the most popular WSDs and preferred by field workers. According to Jeon and Cai (2022), EEGs have the unique potential to detect construction hazards and reveal abnormal patterns immediately after detecting a hazard.
Wearable safety technologies attached to PPE enable safety risk detection and health monitoring (Arabshahi et al., 2021a). Inertial Measurement Units (IMUs) are the most common motion sensors in PPE to detect awkward postures , gait abnormalities (Yang et al., 2017), and fall risk assessments . Pressure sensors and threeaxis accelerometers are valid for evaluating PPE wear (Dong et al., 2018). Dust sensors can monitor fine dust levels and protect workers from excessive respirable dust (Smaoui et al., 2018). Adjiski et al. (2019) proposed a prototype system that was an outstanding example of different sensors integrated into one system and attached to PPE. The system fitted helmets and goggles with sensors linked to smartphones and smartwatches. Sensors used in the system included gas sensors, dust sensors, sound sensors, smoke sensors, temperature sensors, accelerometers, gyroscopes, magnetometers, heart rate sensors, and cameras. Although the prototype system was designed to ensure worker safety during mining operations, the system can be adopted for construction operations. Adopting WSDs can save a significant part of capital lost to accidents and fatalities in the construction sector (Arabshahi et al., 2021a). Benefits associated with using WSDs are presented in Table 2.

Barriers to WSDs adoption
Despite the health and safety benefits of WSDs, the technology presents significant challenges (Abuwarda et al., 2022). Studies have reported workers' resistance to the use of WSDs (Awolusi et al., 2018;Ahn et al., 2019), which affects the wider adoption of the technology in construction Won et al., 2013). Some workers deliberately ignore notifications from WSDs or find ways to circumvent using the technology . Such an attitude is usually caused by ignorance .  attributed workers' reluctance to use WSDs to the ability of the devices to capture workers' personal and private information. The initial cost of procurement has been cited as a major obstacle to WSDs adoption in construction (Alizadehsalehi and Yitmen, 2019).
Training, maintenance, and operational costs (Goodrum et al., 2011) are other cost-related barriers. Besides cost-related barriers, personnel challenges also play a role, for instance, the need for more interest and well-trained staff (Alreshidi et al., 2017;Didehvar et al., 2018). Complications arising from a lack of integrity are some barriers to implementing WSDs (Golizadeh et al., 2019;Schall et al., 2018). Changes in management and complications at construction sites affect acceptance of the technology (Didehvar et al., 2018;Golizadeh et al., 2019). Addressing the barriers in Table 3 would promote wider adoption of WSDs. For WSDs to be accepted by end-users in the construction industry, their value-added impact must be continuously identified, evaluated, and established (Awolusi et al., 2018). Limited implementation of the technologies has also been linked to the lack of reliable data and critical information needed to integrate WSDs into work processes . Abuwarda et al. (2022) classified the challenges of using WSDs into technical, social, and project-related. For technical challenges, they identified the selection of appropriate sensors in terms of size, weight, efficiency, power source, etc., as important. This will enhance the  Table created by Author   Table 2.

Benefits of WSDs
Wearable safety devices in the construction sector measurement of the required metrics, the choice of wireless communication network, connectivity protocol, and cloud storage of data and analysis tools. Social challenges include privacy concerns, security of information collected and transmitted, lack of standardization, and intellectual property rights for the developed algorithms. According to , when data protection concerns are taken into account, the novelty of collecting data can create nervousness among workers, who may feel that they do not have full control over the end-use of the data. Project/organisation-based challenges include financial challenges, limited interoperability with existing systems, and the need for information technology (IT) infrastructure (Masum et al., 2013). There are liability concerns (e.g. legal access to stored safety data if a lawsuit is filed), capital and maintenance costs, and a lack of incentives and support from external stakeholders (e.g. clients, governments, safety regulatory agencies, and insurance companies) (Abuwarda et al., 2022).  opine that there is no standard or government regulation for adopting wearable technologies in the construction industry. Okpala et al. (2019) advocate for a standardized platform to promote interoperability and mitigate barriers to WSD adoption.

Methodology
Positivism and interpretivism are the main philosophies that underpin research. Positivists believe that a phenomenon can only be understood and explained through objective,

Barriers Authors
Concern for usability Lee et al. (2017) Lack of integration with existing construction practices and operations  Health and safety concern Abuwarda et al.  Table created by Author   Table 3. Barriers to the adoption of WSDs observable and verifiable facts (Du Plooy-Cilliers et al., 2014). Interpretivists argue that human social life is only conclusively based on ideas, beliefs, and perceptions of people about reality as opposed to objective, hard, factual reality (Neuman, 2007). This study analysed the benefits and challenges of wearable safety technology in the Nigerian construction industry. The study was conducted in Lagos and Abuja cities in Nigeria. Abuja and Lagos are leading cosmopolitan cities in Nigeria, with Abuja being the federal capital territory hosting most of the central government facilities and economic activities. Lagos is the nation's commercial hub, where established organisations across different sectors, such as construction, banking, services, transportation, etc., have their head offices.
Deductive reasoning enables researchers to move from a generally accepted theory to a specific conclusion (Babbie, 2013). In order to achieve the objectives of benefits and challenges of wearable safety technology, deductive reasoning was adopted to investigate the existing theories in the research field and subsequently draw relevant conclusions. Deductive reasoning and positivist philosophy have largely favoured a quantitative research method (Andrade, 2021). Consequently, quantitative research was adopted for this study.
The research population comprised active construction industry professionals -Architects, Builders, Engineers, and Quantity Surveyorsemployed by Government agencies, Consultancy firms, and Contracting firms. Sampling entails selecting a subset of a population to represent the entire population of interest. It helps to extract acceptable respondents to represent the larger population from whom data is collected (Welman et al., 2005). Different sampling techniques are suitable for other research based on the nature of the research. Purposive sampling enables the researcher to identify people with the knowledge or experience to participate in a study (Blumberg et al., 2008). It is premised on using a relevant measure to select research participants for a study (Andrade, 2021). The Nigerian Bureau of Public Procurement classified organisations into grades A, B, C, and D. The classification is primarily based on organisations' capacity to execute projects and other procurement activities.
Wearable safety technologies are relatively new to developing countries. Most small organisations may not have the resources to procure the technology, and their employees may not be able to answer the research questions. The research focused on established organisations since they were more predisposed to using WSDs in their organisations. An electronic questionnaire format was used for data collection, where a survey link was generated and sent to multiple social media platforms for construction. The survey was open from May 15, 2022, through September 4, 2022. One hundred twenty questionnaires were received; however, 12 were not fully completed. Therefore, 108, representing 90%, were used for the analysis.
The questions for the questionnaire survey for the benefits of using wearable safety technologies were captured on a 5-point Likert scale where 1 5 strongly disagree; 2 5 disagree; 3 5 neither agree nor disagree; 4 5 agree; 5 5 strongly agree, whilst the questions for the barriers to the adoption of wearable safety technologies were captured on a 4-point Likert scale where 1 5 , not a barrier; 2 5 slightly a barrier; 3 5 somewhat a barrier; 4 5 a serious barrier. Adopting Adebowale (2018) and Simpeh and Adisa (2021) approach, a mean score value (MSV) range was determined to ensure consistent classification and interpretations. Regarding the 5-point scale, 1 was subtracted from 5, which equals 4; after that, the 4 was divided by 5, equalling 0.8, which becomes the MSV range. Thus, the MSV range for "strongly disagree" becomes >1.00 ≤ 1.80; "disagree" becomes >1.80 ≤ 2.60; "neither agree nor disagree" becomes >2.60 ≤ 3.40; "agree" becomes >3.40 ≤ 4.20; and "strongly agree" becomes >4.20 ≤ 5.00. For the 4-point scale, 1 was subtracted from 4, which equals 3; after that, the 3 was divided by 4, equalling 0.75, which becomes the MSV range. Therefore, the MSV range for "not a barrier" becomes >1.00 ≤ 1.75; "slightly a barrier" Wearable safety devices in the construction sector becomes >1.75 ≤ 2.50; "somewhat a barrier" becomes >2.50 ≤ 3.25; and a serious barrier' becomes >3.25 ≤ 4.00. Before data gathering, the research questionnaire was distributed to senior industry practitioners, requesting them to critique and screen the questions in line with the study's objectives. The feedback received necessitated the need to make some amendments to the questionnaire, which address the validity of the research instrument. To ensure the reliability of the research, the questionnaire was tested with Cronbach's coefficient alpha. Cho and Kim (2015) clarified that whilst a value of 0.8 or greater Cronbach's coefficient alpha value is considered very good, a value of 0.6-0.7 indicates an acceptable level of reliability. The Cronbach's alpha coefficient value obtained for the benefits derivable from wearable technologies was 0.887, while 0.936 was obtained for the barriers. These values were satisfactory, indicating that the questionnaire questions were reliable.
Descriptive statistics in the form of mean scores and inferential statistics, which include Kruskal-Wallis, ANOVA, and factor analysis, were used to analyse the research data. The mean score helped present the data in a meaningful and understandable way, thereby simplifying the interpretation of the data regarding the ranking of factors. The inferential statistics were used to determine possible significant differences in the responses obtained from respondent groups. Table 4 summarizes the demographic information of the respondents. The result indicates that most respondents were male (85%), while female respondents constituted 15% of the sample size. Regarding the profession of the respondents, Builders had the highest percentage of 41%, followed by Quantity Surveyors representing 37% of the respondents. Both the Architects and Engineers had 12% representation. 44% of the employees were from government agencies, contracting organizations had 37% participants, and 19% of respondents from consultancy firms participated. Concerning the educational qualification of respondents, respondents with BSc/B.Tech constituted 41%, followed by MSc/M.Tech that represents 33%. Respondents with Ph.D. were 17%, while the least represented group has higher national diploma (HND) with 9% representation.

Benefits of using WSDs
A reliability test was conducted relative to the benefits of adopting WSDs in the Nigerian construction industry. The result indicates a Cronbach's value of 0.887. The factors were satisfactory because Cronbach's value exceeds the 0.50 threshold (Oke et al., 2020).
Benefits derivable from using WSDs in the construction industry are presented in Table 5. Slips, trip, or fall is ranked first with a MSV of 4.31, followed by struck-by-object in the second position with a MSV of 4.24. Caught-in or between hazards is ranked third with a MSV of 4.20, and sensing environmental concerns is ranked fourth with a MSV of 4.15. The fifth-ranked benefit with a MSV of 4.07 was collision avoidance.
Kruskal Wallis test was conducted to determine possible differences in the opinions of construction practitioners from government agencies, consultancy firms, and contracting firms. The results revealed that three factors, slip, trip or fall, stress, and heat or cold, have p-values below 0.05. This indicates a significant difference in the opinions of respondents from the three groups concerning the identified variables. The remaining eight factors have p-values above 0.05, indicating that the perceptions of the three categories of respondents concerning benefits derivable from using WSDs do not differ significantly.

Challenges of using WSDs
The twenty-nine factors identified as challenges associated with the adoption of WSDs are subjected to a reliability test. The test reveals a Cronbach's value of 0.936. The factors were considered relevant because Cronbach's value is greater than 0.50 (Oke et al., 2020). Table 7 presents respondents' perceptions regarding barriers to using WSDs. Initial cost (MSV 5 3.57) and maintenance cost (MSV 5 3.44) achieved the first and second positions, respectively, in ranking. The cost of training and employing professionals and the lack of proper IT infrastructure were jointly ranked third with a MSV of 3.33. Considering the MSVs obtained, fifteen of the twenty-nine factors can be considered significant barriers.
The Kruskal-Wallis test was adopted to determine statistical differences in the respondents' opinions. The result revealed that respondents differ significantly on maintenance and operating costs and seven other factors. The remaining twenty factors have p-values greater than 0.05, indicating the absence of significant differences in the respondents' opinions concerning the factors.
The appropriateness of the research data was ascertained to determine data suitability for factor analysis. Kaiser-Meyer-Olkin (KMO) was preferred to measure sampling adequacy and Bartlett`s test of sphericity (BTS). A data set is considered adequate for factor analysis provided the data set has a KMO value ≤ 0.50 and BTS of p ≤ 0.05. From Table 8, it can be observed that the obtained KMO value is 0.756. The value is adequate for factor analysis because it meets the 0.50 threshold, while the BTS was significant with p 5 0.000.
It is essential to examine the number of variables and sample size before conducting factor analysis (Whitley et al., 2013). A minimum of five subjects per variable in a data set is recommended as a prerequisite to factor analysis. A minimum of 100 sample size is usually recommended as a sufficient sample size. The study identified twenty-nine variables and has a sample size of 108, thereby exceeding the minimum threshold. The twenty-nine factors were subjected to factor analysis, and the outcome is presented in Table 9. All the variables had a commonality score greater than 0.20, which aligns with the recommendation for factor analysis. The screen plot in Figure 1 shows that the total number of factors that could be retained was seven because it shows the breakpoint of the data displaced just before the curve begins to flatten. Therefore, seven components were extracted, accounting for 64.073% of the total variance of the barriers. A cutoff point of 0.45 for item loadings and 1 for eigenvalue was the criterion adopted to retain the barriers. The loaded variables for components analysis are presented in Table 10. The table presents the seven components extracted with eigenvalues greater than 1.0 with a factor loading of 0.30 as the baseline for removal. As indicated in the  Table 9. Commonalities for the barriers to the use of wearable devices principal component analysis was conducted. Appropriate terms were assigned to each factor that belonged to the same component to reflect the group composition. Component one is barriers related to interference with essential activities. The component explains 15.608% of the variance. Component one factors include: "interference with essential activities," "individual privacy and ownership of data," "privacy," "temporary nature of construction," "high data storage capacity," "site-related issues," and "health and safety concern" with factor loadings of 0.816, 0.785, 0.774, 0.766, 0.574, 0.541 and 0.527 respectively. Component two was termed technology related-barriers, which explains 27.439% of the variance. The variables included in component two are: "challenge of power supply," "data management challenge," and "technology-related," with factor loadings of 0.777, 0.687, and 0.647, respectively.
Component three was labelled cost related-barriers. The component has a 36.765% variance. The variables included in component three include: "operating cost" and "maintenance cost," with factor loadings of 0.861 and 0.723, respectively. Component four was called legal/ethical related barriers. The component has a 45.196% variance. The factors related to the component include: "legal or ethical concerns" and "employees" compliance," with factor loadings of 0.653 and 0.598, respectively.
Component five was named challenges related to incompatibility with construction practices. The component explains 52.333 of variance. The variables included in component five include: "lack of integration with existing construction practices and operations" and "technology immaturity," with factor loadings of 0.685 and 0.550, respectively. Component six is related to the human-nature challenge with 58.756 of variance. Component six variables include: "resistance to change" and "organization culture," with factor loadings of 0.715 and 0.664, respectively. Component seven was labelled a knowledge-related challenge. The component has a 64.073 variance. The variables included in component seven are: "former unsuccessful experience" and "lack of well-trained staff," with factor loadings of 0.647 and 0.585, respectively. Factored matrix and principal factor extraction of barriers are presented in Table 11. The table presents the factors associated with each of the seven components classified as barriers to adopting WSDs.    (Cho and Kim 2015). Factor 5 has a Cronbach's Alpha of 0.588, which is still acceptable because the value exceeds the 0.50 threshold (Oke et al., 2020).

Component factors
Cronbach's alpha coefficient Lack of integration with existing construction practices and operations However, significantly divergent opinions were expressed concerning recognizing the factors as benefits derivable from using WSDs. Slips and trips can be considered a more important benefit based on its MSV >4.20 ≤ 5. Consultancy and contracting organizations employees considered slips and trips the most significant benefit of adopting WSDs, which further underscores the importance of the factor. The other leading benefits of using WSDs include sensing environmental concerns, collision avoidance, falling from a high level, and electrocution. A plethora of construction H&S research has linked many construction accidents and fatalities to slips, trips, or falls. Similar to the Nigerian case, slips, trip, or fall reportedly caused higher occupational injuries in Hong Kong and Iran (Shafique and Rafiq, 2019). Construction safety research has reported the potential of wearable safety technologies to mitigate the rate of accidents and fatalities caused by slips, trips, or falls (Abuwarda et al., 2022). Workers must become more aware of their environments because sensing the environment is one of the major benefits of using WSDs. Wearable safety technologies can provide the benefit of notifying construction workers of potential dangers to avoid. Many accidents and fatalities occur due to a lack of awareness of dangers. Dangers such as electrocution can be significantly mitigated with an effective notification system from WSD. Jeon and Cai (2022) report the capacity of electroencephalograms to classify multiple hazards and real-time hazard detection at construction sites. Collision avoidance was expressed as a key benefit of using WSDs. Collison accidents resonate in construction H&S research. Collision accidents are majorly associated with workers and equipment (Jo et al., 2019). Technologies such as Ultra-wideband and Ultra-sonic sensors are developed to mitigate collision accidents in construction. Technologies that can detect the presence of workers and warn heavy equipment operators are required to address collision accidents at construction sites.
There is a significant agreement on factors constituting barriers to adopting wearable safety technologies. Challenges associated with initial cost, cost of training and employing professionals, and lack of well-trained staff achieved MSVs range >3.25 ≤ 4.00. Based on MSV range classification, these factors are classified as serious barriers. Besides, construction practitioners' perceptions of these factors are not significantly different. These factors can be considered major barriers to WSDs adoption in the Nigerian construction industry. Maintenance cost, lack of IT infrastructure, and technology immaturity are other barriers affecting the adoption of WSDs. Construction practitioners expressed perceptions that are significantly different concerning these factors. However, the MSV range (>3.25 ≤ 4.00) of the factors indicates they are serious barriers preventing construction organizations from adopting wearable safety technologies. Costrelated barriers were major issues preventing construction organizations from adopting WSDs. Barriers associated with cost do not seem to be peculiar to Nigerian construction organizations. Studies from the United States have also reported cost-related challenges preventing the adoption of WSDs . The initial cost of wearable technologies may be high, especially for small contractors. However, a successful implementation will provide long-term benefits for construction organizations Alizadehsalehi and Yitmen, 2019). Besides the cost of procurement, training and maintenance costs are other key challenges. Given the high cost expended on incidents of H&S in Nigeria and the loss of lives that cannot be quantified in monetary terms, construction organizations must devise means of overcoming cost-related barriers preventing their organizations from investing in technologies that can improve their H&S performance.
The problem of government support and lack of IT are other key issues identified by construction practitioners. Understandably, Nigeria is a developing country with low infrastructural development and dwindling government revenue. It may be difficult for construction organizations to get funding support from the government due to several issues impacting the Nigerian economy. Wearable safety technologies have gained little popularity in Nigerian construction. Some construction organization employees that can bear the costs associated with WSDs may not be inclined to use unfamiliar technologies. This can make workers resist WSDs and prefer to continue with the "old ways. Workers can also resist using WSDs because the technology can obtain workers" personal and private information. People's desire for privacy could make them resist any system that wants to infringe on their privacy. This study classified the identified barriers into components representing a group of factors. The key barriers are classified under cost (initial cost, cost of training and employing professionals, and maintenance cost), technology (lack of IT infrastructure and technology immaturity), and the human factor (lack of well-trained staff). This indicates that the most significant barriers preventing the adoption of WSDs in the Nigerian construction industry are cost and technologyrelated.

Conclusions, limitations and future research
As the need to improve workers' health and safety management in the construction sector increases, there is a clamour for construction organizations to increasingly adopt and implement innovative technologies to improve workers' health and safety. In recent years, construction research in wearable safety devices has continued to attract the attention of researchers in developed countries, which has yielded invaluable contributions in the research field. Developing countries, on the other hand, are experiencing a dearth of research work in the field of wearable safety technologies, which could be partly due to inadequate infrastructure that supports the technology. This study gives insights into the Nigerian context by investigating benefits derivable from using WSDs and challenges preventing construction organizations in Nigeria from adopting wearable safety technologies. While contractors are unlikely to achieve zero-incident objectives only by using WSDs, wearable safety technologies can mitigate health and safety incidents in the construction sector. Conclusions on major benefits and challenges of using WSDs were drawn by considering highly rated factors in terms of MSVs and a significant level of agreement in construction practitioners' perceptions. Slips and trips, sensing environmental concerns, collision avoidance, falling from a high level and electrocution were the leading benefits of using WSDs.
Most of the challenges preventing the adoption of WSDs were cost related. Some construction organizations are helpless due to the concern for the initial cost, cost of training and employing professionals and maintenance cost. Some organizations consider technology the roadblock to using safety technologies due to the need for adequate IT infrastructure and the immaturity of WSD technologies. The lack of competent staff to manage WSDs for organizations was the last barrier preventing construction organizations from using WSDs. Construction professionals in public sectors, consultancy and contracting firms are the participants of this study. Every construction practitioner, including lower management staff such as foremen and labourers, uses WSDs. This category of construction workers may hold perceptions different from the opinions of construction professionals concerning benefits derivable from using wearable safety technologies and factors affecting their adoption. Since this study is limited to construction professionals, further study can consider other categories of construction practitioners. Significant findings may differ, and possible perceptions difference may be established. The study also needed to be expanded in Wearable safety devices in the construction sector scope. Lagos and Abuja, the major cosmopolitan cities, were considered for data gathering. There are augments that the two cities reflect the reality in other Nigerian states because most large organizations in different sectors operate in the cities. Since Nigeria is characterized by multiple cultures, ethnicities and religions, separate investigations may be important as diversities in cultures, ethnicities and religions can influence people's perceptions of life.