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Prior research on the police decision to use deadly force has tended to neglect multivariate relationships, particularly at the situational level. This paper makes use of data describing deadly force incidents in Philadelphia during two time periods (1970‐1978 and 1987‐1992) and employs multivariate analyses to identify situational predictors of police shootings involving gun‐assaultive suspects. Findings from the multivariate analyses are then used in a pilot effort to develop predictive risk classifications of deadly force incidents. Identification of predictors of deadly force is helpful not only in assessing the relative contributions of situational variables but also in shaping our understanding of the behavior of line officers who are forced, by the nature of their work, to make split‐second decisions involving life and liberty with minimal guidance and support from the police department.

Policing faces several critical problems, the most immediate of which are arguably public perceptions of racial bias, and widely prevalent officer fatigue related to shift work and long work hours. The purpose of this paper is to determine whether the “reverse racism effect” still occurred when officers were extremely fatigued.

Controlled laboratory experiments were conducted during which experienced police patrol officers responded to black and white suspects in deadly force judgment and decision-making simulations on two occasions; once immediately following the last of five consecutive 10:40 hours patrol shifts (fatigued condition) and again 72 hours after completing the last shift in a cycle (rested condition).

Contrary to expectations, the authors found that officer fatigue did not significantly affect shooting behavior. Furthermore, the authors did not find a significant interaction between officer fatigue and suspect race on either reaction time to shoot or the likelihood of shooting an unarmed suspect. Thus, the reverse racism effect was observed both when officers were rested and fatigued.

As policing agencies around the country respond to allegations of racial bias, both the public and police search for empirical evidence about whether negative perceptions are accurate about officers’ motivations in deadly encounters. The research reported here provides insight about how fatigue effects officers’ decisions to shoot black vs white suspects, and directly addresses this high profile and divisive national issue.

This is the first valid experimental test of the impact of fatigue on officer shooting behavior, and the interaction between police fatigue and suspect race on decisions to shoot.

The purpose of this paper is to examine police shooting accuracy and the factors that influence whether officers hit, or miss, their intended target.

Descriptive statistics explore both incident-level and hit rate shooting accuracy in single officer/single suspect shooting incidents in the Dallas Police Department between 2003 and 2017. Multiple regression models analyze the predictive utility of officer, suspect and situational factors on the two accuracy outcomes.

Consistent with prior research, the results demonstrate that officers are often inaccurate in officer-involved shooting (OIS) incidents. Additionally, several factors emerged as significant predictors of shooting accuracy.

The results are discussed in terms of the practical implications for training and accountability.

It has been more than a decade since the last academic study investigated this important topic using actual OIS data. Acknowledging the general dearth of this literature, this study explores what factors contribute to shooting accuracy.

The present study examines a range of police force on the continuum (firearms, TASER/chemical spray and physical force) to see whether they are associated with individual (subject and officer), situational and/or neighborhood factors.

A partial proportional odds model is used to analyze police use of force data from 2003 to 2016 in Dallas. Independent variables are allowed for varying effects across the different cumulative dichotomizations of the dependent variable (firearms vs TASER/chemical spray and physical force and firearms and TASER/chemical spray vs physical force).

Most officer demographic and situational factors are consistently significant across the cumulative dichotomizations of police force. In addition, suspect race/ethnicity (Hispanic) and violent crime rates play significant roles when officers make decisions to use firearms, as opposed to TASER/chemical spray and physical force. Overall, situational variables (subject gun possession and contact types) play greater roles than other variables in affecting police use of force.

Despite the large body of police use of force research, little to no research has used the partial proportional odds model to examine the ordinal nature of police force from physical to intermediate to deadly force. The current findings can provide important implications for policy and research.

There has been an increasing emphasis on developing officers who can effectively make decisions in dynamic and stressful environments to manage volatile situations. The aim of this paper is to guide those seeking to optimize the limited resources dedicated to police training.

Drawing on research related to stress exposure training, principles of adult learning, the event-based approach to training and policing more broadly, the authors show how carefully crafted training scenarios can maximize the benefits of police training.

The authors’ review highlights various training principles that, if relied on, can result in scenarios that are likely to result in the development of flexible, sound decision-making skills when operating under stressful conditions. The paper concludes with an example of scenario development, which takes the reviewed principles into account.

The authors hope this discussion will be useful for police instructors and curriculum designers in making evidence-informed decisions when designing training scenarios.

The purpose of this paper is to investigate whether citizen characteristics (race/ethnicity and attire) or demeanor predicted how officers interacted in simulation scenarios that could turn violent.

Controlled-laboratory experiments were conducted during which police participants (n=50) responded to equivalent numbers of black, white, and Hispanic individuals in multiple branching video scenarios in a use-of-force simulator. Within these scenarios, the attire of on-screen individuals was varied (“street” or “business” clothing) as was their demeanor – individuals were either friendly or confrontational. Each scenario had the potential to end peaceably or turn violent, depending on how the officers treated people in the simulator.

Multi-level modeling revealed that neither the race/ethnicity nor the attire of on-screen individuals predicted how officers interacted with them. However, the demeanor of on-screen individuals did – officers were significantly more likely to verbally escalate and end up with a deadly outcome when faced with confrontational individuals (f=3.96; df=1, 558; p<0.05).

These findings offer important new insight into how fairly officers interact with people during routine encounters that have the potential to turn violent, and what this means for perceptions of police legitimacy, procedural justice, and allegations of racial bias.

This is the first laboratory study to test the impact of citizen characteristics and demeanor on how officers escalate and de-escalate encounters.

American police agencies' swift adoption of body-worn camera (BWC) technology, coupled with the ubiquity of smartphones and social media, has led to a “new visibility” of policing. Video recordings are often touted as objective evidentiary accounts of police-civilian interactions. Yet even these recordings are rarely seen in a vacuum, but instead accompanied by headlines and accounts.

Using a diverse sample of young American adults (N = 943) and an experimental design incorporating a short poorly recorded BWC video embedded within a survey, this study investigates perceptions of the appropriateness of police behavior in an ambiguous situation where officers used deadly force on a Black civilian. All respondents viewed the same video, but were randomly assigned to one of four ultimate outcomes.

Respondents overwhelmingly reported the BWC video was personally important and significant for a subsequent investigation and public opinion. The experimental manipulation, along with background factors, exerted a substantial effect on perceptions of the officers' actions. Respondents found the officers' actions more appropriate when told the civilian held a weapon.

Americans are divided on the role of police in a democratic society. Objective accounts like video recordings may be used to build consensus, but our results, derived from a novel method and dataset, suggest deeper cognitive biases must also be overcome.

The purpose of this paper is to evaluate officer and civilian race/ethnicity disparities during ten years of officer-involved shootings (OIS).

Internal affairs, personnel and geospatial data were triangulated for 253 OIS at the Dallas Police Department from 2005 to 2015. Multinomial regression models were used to evaluate the relationship between civilian and officer race/ethnicity in OIS, controlling for officer, situational and neighborhood factors.

In total, 48 percent of unique OIS involved a non-Hispanic black civilian and most OIS occurred in Hispanic majority neighborhoods (48 percent). Officer age and number of shooters on scene were the only variables significantly associated with officer race/ethnicity. Most notably, officer race/ethnicity was not associated with the race/ethnicity of the civilian during OIS incidents.

There is limited scientific evidence on whether officers of certain races/ethnicities are disproportionately likely to engage in OIS with civilians of a particular race/ethnicity due to the relative rarity of such events.

The purpose of this paper is to better depict the features of individual and group behaviors in sequential decisions under the effect of public belief drift.

In this paper, the authors design a two‐shots game which is closer to decisions condition in the real market by using the method of experimental economics two shots game.

The experimental results show that information cascade occurs more frequently in the second stage and the decision accuracy is decreased. The conclusion may provide experimental evidence for the “Animal Spirits Theory” of Keynes. Additionally, decision‐maker ranking in the middle of the decision sequence systematically deviates from his/her private information in balance state.

As existing information cascade theory of one shot decision fails to describe the belief‐dependent mechanism, the authors design the multi‐shots information cascade experiment; in which every individual decision maker has more than one sequential decision chance on the same event.

Few studies have tested the efficacy of instruction based on cognitive load theory in police use-of-force (UoF) training due to limitations of existing cognitive load measures. Although linguistic measures of cognitive load address these limitations, they have yet to be applied to police UoF training. This study aims to discuss the aforementioned issue.

Officers’ verbal behavioral data from two UoF de-escalation projects were used to calculate cognitive load and assess how it varied with officer experience level (less-experienced, experienced). The verbal data were further analyzed to examine specific thinking patterns that contributed to heightened cognitive load across officer experience levels.

Across both studies, responses from less-experienced officers contained greater usage of cognitive language than responses from experienced officers. Specific cognitive processes that contribute to cognitive load in specific situations were also identified.

This paper enables police trainers to facilitate the development of adaptive training strategies to improve police UoF training via the reduction of cognitive load, and also contributes to the collective understanding of how less-experienced and experienced officers differ in their UoF decision-making.