The impact of TASERs on police use-of-force decisions: Findings from a randomized field-training experiment

This paper presents findings from a randomized field-training experiment designed to study the impact TASERs on police officers’ use-of-force decisions. Officers were randomly assigned to either a treatment group (with TASERs) or a control group (without TASERs) and then participated in training scenarios involving different levels of suspect resistance. The study investigates whether and to what extent officers armed with the TASER use it as an alternative to other types of less-lethal force (e.g., empty hands, pepper spray, and the baton) and the firearm, controlling for the level of suspect resistance. The findings indicate that officers who were armed with the TASER were significantly less likely to deploy pepper spray and the baton in response to aggressive physical resistance. Additionally, the results show that officers equipped with the TASER were less likely to discharge their firearm when confronted with suspect resistance that was potentially lethal. No differences in police behavior occurred in response to passive suspect resistance.     

Procedural justice training for police recruits: results of a randomized controlled trial

Journal of Experimental Criminology - Procedural justice training for police officers is designed to improve officers’ interactions with the public. Aside from the fact that it is a given...     

A partially randomized field experiment on the effect of an acoustic gunshot detection system on police incident reports

Journal of Experimental Criminology - To examine whether the introduction of an acoustic gunshot detection system (AGDS) allied to CCTV cameras increased the frequency of confirmed incidents of...     

School-based services for youth with prior police contact: a randomized controlled trial

Journal of Experimental Criminology - We present results from a randomized controlled trial of a school-based intervention that provided services to youth with prior police contact. The...     

Evaluating the relative impact of positive and negative encounters with police: a randomized experiment

Objectives

Examines the influence of positive, negative, and neutral police behavior during traffic stops on citizen perceptions of police.

Methods

Participants were randomly assigned to view a video clip of a simulated traffic stop in which the officer communicates with the driver in a positive (procedurally just), negative (procedurally unjust), or neutral manner. After viewing the video, participants completed a survey about their perceptions of police, including their level of trust in police, obligation to obey police orders, and willingness to cooperate with police.

Results

Observing positive interactions with police enhanced people’s self-reported willingness to cooperate with police, obligation to obey police and the law, and trust and confidence in police, whereas observing negative interactions undermined these outcomes. The effects of these interactions were much stronger for encounter-specific outcomes than for more general outcomes.

Conclusions

The results from this randomized experiment confirm that procedural justice can enhance people’s prosocial attitudes toward police, whereas procedural injustice can undermine these attitudes. While positive (procedurally just) interactions tend to have weaker effects than negative (procedurally unjust) interactions, this study finds little support for the notion that only negative experiences shape people’s views about the police.

     

The results of a randomized controlled trial of police body-worn video in Australia

Journal of Experimental Criminology - We report the results of a randomized controlled trial of police body-worn video (BWV) cameras in an Australian context, with a focus on how cameras influence...     

The effects of a group batterer treatment program: A randomized experiment in Brooklyn

Despite numerous evaluations of batterer treatment programs, most lack sufficient methodological rigor to yield valid answers about the programs' effectiveness. This paper presents results from an experimental evaluation in which 376 adult males convicted of domestic violence were randomly assigned to either a 40-hour batterer treatment program or 40 hours of community service that did not include any therapeutic treatment. We examined both official records and victims' reports of recidivism. Those assigned to the treatment program showed significantly lower recidivism, on the basis of all outcome measures from official records. Although victims' reports also recorded fewer failures among the batterers assigned to the treatment group, the differences in failure rates were not large enough to be statistically significant. Overall results suggest that therapeutic treatment for batterers may reduce domestic violence among convicted batterers who agree to this sentence.     

A simple checklist,that is all it takes: a cluster randomized controlled field trial on improving the treatment of suspected terrorists by the police

Journal of Experimental Criminology - When it comes to interviewing suspected terrorists, global evidence points to harsh interrogation procedures, despite the likelihood of false positives. How...     

Professionalization and unionization of police: A Delphi forecast on police values

The Delphi Forecasting technique was utilized to assess the general direction and magnitude of broad future trends in the occupationally-related values of police officers. Two panels of experts were established and utilized in the Delphi Process: one composed of veteran police officers and the other consisting of law enforcement educators, top echelon police administrators, attorneys, and social ethicists.Two major trends emerged in the course of the study: a movement toward professionalization and a movement toward unionization. These two movements were found to embody generally conflicting sets of occupationally-related values.The increasing emphasis of police chiefs and their administrators on managerial efficiency was identified as the critical factor influencing the future of these trends.     

Analyzing the nature of police involvements: A research note concerning the effects of forms of police mobilization

Studies of the police have reported that much of the work patrol persons do is service-oriented. However, many of those researches relied upon citizen-initiated involvements as units of analysis. Here the distinction has been made between reactive and proactive forms of police mobilization. When activity data are analyzed in this fashion, it is found that the police initiate a larger proportion of law enforcement activities than was supposed. The implications for research are discussed.     

Long-term effects of two childhood psychosocial interventions on adolescent delinquency,substance use,and antisocial behavior: a cluster randomized controlled trial

Objectives

Examine the long-term effects of two childhood universal prevention programs on adolescent delinquency, substance use, and antisocial behavior.

Methods

The cluster randomized controlled trial involved 56 schools and 1,675 children in Zurich, Switzerland. Two evidence-based interventions, namely the social-emotional skills program Promoting Alternative Thinking Strategies (PATHS) and the cognitive-behavioral parenting program Triple P, were implemented during the first two years of primary school, at ages 7 and 8 years. Outcomes were measured at ages 13 and 15 years, and included youth self-reports and teacher assessments. Multilevel models were used to account for the clustered nature of the interventions. Effects were estimated with the inclusion of baseline covariates.

Results

Across 13 outcomes related to delinquency, substance use, and antisocial behavior at ages 13 and 15 years, only two non-negligible effects were found. The first was a reduced prevalence of police contacts in the PATHS condition [effect size (ES)?=??0.225). The second was a difference in competent conflict resolution skills in the combined PATHS?+?Triple P condition compared to the context (ES?=?0.259), but in the unexpected direction: participants in the combined treatment appeared to be less competent than their control group peers. All other effects were either statistically non-significant or negligible in size (i.e., ES?<?|0.200|).

Conclusions

Even “evidence-based” interventions may have few long-term effects on delinquency, substance use, and antisocial behavior. Our findings add to the small literature on the long-term effectiveness of early universal prevention in field settings.

     

Opportunity,motivation, and assaults on police: A bivariate arima analysis

Drawing on insights garnered from the routine activity and pluralistic conflict perspectives, the present investigation examines the interrelationships between structural sources of opportunities and motivations to engage in potentially conflictive interactions with police personnel and assaults against the police. Overall, the longitudinal analyses of the reciprocal relationship between total and disaggregated measures of arrest and non-lethal assaults within Oklahoma City, Oklahoma tend to produce weak and insignificant results. The implications of these findings for opportunity theories of crime are discussed.     

A randomized controlled trial of the effectiveness of multisystemic therapy in the Netherlands: post-treatment changes and moderator effects

Objective

In the present randomized controlled trial, the effectiveness of multisystemic therapy (MST) in The Netherlands was examined. Moderator tests were conducted for ethnicity, age and gender.

Methods

The sample consisted of N?=?256 adolescents, referred because of conduct problems, and randomized to MST or treatment as usual (TAU). Assessments (questionnaires and observational ratings) took place before and immediately after the treatment.

Results

MST was more effective than TAU in decreasing externalizing behavior, ODD, CD and property offences, but not for violence. Findings were mixed for adolescents’ and parental cognitions: the MST group, compared to TAU, showed an improvement in parental sense of competence, and a decrease in adolescents’ hostility, but no change in self-esteem and an increase in personal failure. MST was effective for positive dimensions of parenting and associations with prosocial peers, but not for relationships with deviant peers. MST was equally effective for adolescents of different ages and with different ethnicities. However, MST showed larger (and more positive) effects for adolescent cognitions for boys than for girls.

Conclusions

Effects of MST in The Netherlands are generally comparable to the positive findings reported in American and Norwegian trials. MST seems equally effective across age and ethnic minority groups, but some gender moderator effects were found for adolescent cognitions.     

死刑威慑力的犯罪学分析

死刑对遏止严重犯罪最具威慑力,一向是国家保留死刑的最主要根据。事实上,无论是死刑立法还是死刑执行,都不可能产生人们所预期的特殊威慑效果。在这一问题上,人们惯常于从一般法理角度或从人权原理出发去进行应然性探讨,难免思辨有余而说服力不足。立足于对现有实证研究结论的正确解读和基于人性立场去伪存真地辨析,不仅有助于终结在死刑存在根据上的简单重复和无谓争辩,而且也有助于认清无论是死刑的废除还是保留皆具有其合理性的实质,从而明确国家在推进社会文明语境下控制死刑应该努力的基本方向。     

The effects of tenure on police officer personality functioning

The study compared pre-employment and current MMPI/MMPI-2 Basic Scale scores of small- and mid-size city Texas municipal police officers to assess longitudinal personality change. Participants had at least five years continuous, “street level” police experience. Twenty-three veteran police officers from a mid-size city and 19 small-city police officers volunteered to participate. Pre-employment MMPI/MMPI-2 information was obtained from police department records. Current MMPI-2 data was collected in small group or individual administrations. Significant increases in K-corrected T-Scores occurred on Scale F and eight of the Basic Scales; L and K decreased significantly. Mean scores remained within the normal range. Mid-size city officers produced higher K and 5 scores than small-city officers. Authors' Note: We gratefully acknowledge the assistance of Rick Bradstreet, Ph.D., and E. S. Collins, Chief of Police, in the data collection process. The results of this study were presented at the Annual Convention of the American Psychological Society in Denver, Colorado, in June 1999.     

Low-intensity community supervision for low-risk offenders: a randomized,controlled trial

The Philadelphia Low-Intensity Community Supervision Experiment provides evidence on the effects of lowering the intensity of community supervision with low-risk offenders in an urban, US county community corrections agency. Using a random forests forecasting model for serious crime based on Berk et al. Journal of the Royal Statistical Society, Series A, 172(Part 1), 191–211, 2009, 1,559 low-risk offenders were identified and randomly assigned to either standard or reduced frequency of mandatory office visits. Treatment as assigned was substantially delivered at 4.5 probation visits per year versus 2.4, for as long as offenders remained on active probation or parole. In a one-year follow-up for all cases, outcomes examined were the prevalence, frequency, seriousness and time-to-failure of arrests for new crimes committed after random assignment was implemented. No significant differences (p = .05) in outcomes were found between standard and low-intensity groups. Non-significant differences for offense seriousness favored the low-intensity group. We conclude that lower-intensity supervision at the tested level of dosage can allow fewer officers to supervise low-risk offenders in the community without evidence of increased volume or seriousness of crime.     

Crime,detection rate,and the police: A macro approach

Dutch criminality and its relation to the performance of police and justice have only recently been analyzed at the macro level (e.g., at the level of municipalities or the whole country). This type of approach is a useful supplement to analyses at the micro level (that of individuals), which are more common in Dutch empirical criminological research. The main results of such a macro approach are presented in this article. We conclude that the per capita numbers of youth, divorced people, and unemployed contribute significantly to the crime rate. The police strength and solving rates are important factors as well. Analysis of the production process of the police reveals that detecting one more case of driving under the influence is far more expensive than solving one more other crime or handling one more traffic accident. The results are combined to sketch a cost-benefit approach of different strategies in allocating more resources to the police. Allocating extra resources to solving more cases of vandalism gives the best cost-benefit ratio.     

The effects of criminal victimization and judicial or police contacts on public attitudes toward local police

The effects both of victimization and of police or judicial contacts on attitudes toward the police are studied by means of survey data collected in British Columbia (Canada). Such attitudes toward the police are generally favorable across all subpopulations but tend to be lower than average among: people who have experienced a household criminal victimization during the preceding year, those who have experienced an adverse contact with the police, and especially among those who have experienced or observed what they perceive to be improper police field practices. Police perceptions of widespread hostility appear unwarranted, even in the case of traffic violators and of those who have been arrested or convicted. Such findings are compared with data from other parts of Canada, the United States, Australia, and New Zealand.