Anti-theft procedures and fixtures: a randomized controlled trial of two situational crime prevention measures

Objectives  

This study was designed to test two problem-focused situational crime prevention treatments (protective display fixtures and special high-loss product handling procedures) on loss and sales levels of a perennial ‘hot product’ (premium shaving blade replacement packs).     

The mobilization of computerized crime mapping: a randomized controlled trial

Journal of Experimental Criminology - To develop and evaluate the effectiveness of a decentralized, smartphone-based crime mapping and analysis tool designed for law enforcement officers working in...     

Hot spots policing and crime prevention: A systematic review of randomized controlled trials

Crime scholars and practitioners have argued that police actions should be focused on high-risk crime places rather than spread thinly across the urban landscape. This review examines five randomized controlled trials of the effects of concentrating police enforcement efforts on crime hot spots. The findings of these evaluations suggest that focused police actions can prevent crime and disorder in crime hot spots. A meta-analysis of the effect sizes from the five experiments reveals a statistically significant mean effect size for hot spots policing interventions; this suggests overall reductions in citizen calls for service in the treatment hot spots relative to the control hot spots. These studies also suggest that focused police actions at specific locations do not necessarily result in crime displacement. Although these evaluations reveal that these programs work in preventing crime, additional research is needed to unravel other important policy-relevant issues such as community reaction to focused police enforcement efforts.     

A randomized controlled trial of different policing strategies at hot spots of violent crime

Focusing police efforts on “hot spots” has gained acceptance among researchers and practitioners. However, little rigorous evidence exists on the comparative effectiveness of different hot spots strategies. To address this gap, we randomly assigned 83 hot spots of violence in Jacksonville, Florida, to receive either a problem-oriented policing (POP) strategy, directed-saturation patrol, or a control condition for 90 days. We then examined crime in these areas during the intervention period and a 90-day post-intervention period. In sum, the use of POP was associated with a 33% reduction in “street violence” during the 90 days following the intervention. While not statistically significant, we also observed that POP was associated with other non-trivial reductions in violence and property crime during the post-intervention period. In contrast, we did not detect statistically significant crime reductions for the directed-saturation patrol group, though there were non-significant declines in crime in these areas during the intervention period. Tests for displacement or a diffusion of benefits provided indications that violence was displaced to areas near the POP locations, though some patterns in the data suggest this may have been due to the effects of POP on crime reporting by citizens in nearby areas. We conclude by discussing the study’s limitations and the implications of the findings for efforts to refine hot spots policing.     

Improving forensic responses to residential burglaries: results of a randomized controlled field trial

Objectives

Residential burglaries (or break and enters) can cause great concern to the public but are typically a routine police job. The present study sought to evaluate an enhanced police approach to this high-volume crime by emphasizing police–victim interactions and more thorough forensic examinations.

Methods

Scenes of crime officers (forensic examiners) were randomly assigned to either a control (business-as-usual) or experimental condition. Officers in the experimental condition received additional training and resources to upskill them in DNA and fingerprint evidence collection and crime scene evaluation. Experimental officers also received additional training on procedurally just approaches to dealing with victims and were encouraged to be more thorough and spend more time at these high-volume crime scenes.

Results

The trial revealed that the enhanced, experimental, approach offered a number of benefits, including greater evidence collection, identification, and incidents solved. Further, this enhanced approach boosted victims’ perceptions of officers’ procedural justice and satisfaction with the procedures used. However, this approach was more costly in relation to time, and the additional collection of extra DNA evidence did not greatly add to the crime solvability of these incidents.

Conclusions

High-volume crimes such as break and enters have a significant impact on the victims and often go unsolved. This study provides causal evidence that enhancing officers’ attendance and attention to victims and evidence at these scenes can increase solvability and enhance victim experiences.

     

Science, politics, and crime prevention: Toward a new crime policy

Objective

Crime prevention has entered a new, more robust phase of research activity and holds greater relevance to policy and practice today than ever before. It stands as an important component of an overall strategy to reduce crime. This paper sets out a modest proposal for a new crime policy to help build a safer, more sustainable society.

Materials and methods

Narrative meta-review of the crime prevention literature.

Results

The central features include: ensuring that the highest quality scientific research is at center stage in the policy-making process; overcoming the “short-termism” politics of the day; and striking a greater balance between crime prevention and crime control. Both simulation studies and experiences in Washington State show that early prevention can reduce crime, save money, and reduce the need for costly incarceration.

Conclusions

Quality criminological research should be used to strike a policy balance between crime prevention and crime control.     

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.     

Treating alcohol-related violence: a feasibility study of a randomized controlled trial in prisons

Purpose: There is a lack of good-quality outcome evaluations of interventions for offenders whose crimes are alcohol-related. Randomized controlled trials (RCTs) are considered gold standard in treatment evaluations. Here, we report on a feasibility study for an RCT of an alcohol-related violence intervention, Control of Violence for Angry, Impulsive Drinkers (COVAID). Method: 115 adult male prisoners were randomly allocated to COVAID plus treatment as usual (TAU) or TAU only. Results: Most participants (84%) found COVAID useful. Reconviction data at six months were accessed for 109 (95%) participants. There were no differences between the two groups on violent reconvictions or all reconvictions at the six-month period, but at 17?months the COVAID group had 13% fewer people reconvicted for violence, and 20% fewer had reconvictions for any offence. Conclusion: The results indicate that an RCT is feasible and provides parameters for designing a full RCT. Differences in reconviction between groups favoured COVAID and were clinically important.     

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...     

Drive-away policing and situational crime prevention in China: an analysis of motorcycle ban (jinmo) policy in Guangzhou

Using the example of motorcycle ban policy in Guangzhou, the capital of Guangdong province, this article examines how situational crime prevention strategies are used in contemporary urban China. The article argues that although a motorcycle ban policy may reduce motorcycle snatch theft (feiche qiangduo) in Guangzhou, it inevitably caused a problem of displacement. However, some types of displacement are desirable for local government. An argument about drive-away policing is proposed in this article to understand policing styles in contemporary China. In addition, the article argues that motorcycle ban, as a strategy to prevent snatch theft and robbery, is also a strategy to deal with the crisis in police legitimacy. Therefore, crime prevention in China has more social and political significance than just reducing crime.     

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...     

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.

     

Surveillance cameras and crime: a review of randomized and natural experiments

Research on the effectiveness of surveillance cameras in reducing crime suffers from potential threats to causal validity. This paper reviews seven studies that address some of these problems using the rigorous research designs of randomized and natural experiments. Included studies that reported changes in total crime found crime reductions ranging from 24 to 28% in public streets and urban subway stations, but no desirable effects in parking facilities or suburban subway stations. Moreover, surveillance cameras may help reduce unruly behaviour in football stadiums and theft in supermarkets/mass merchant stores. These findings indicate that video surveillance can reduce crime in several settings.     

When crime prevention harms: a review of systematic reviews

Objectives

In a series of important scholarly works, Joan McCord made the case for the criminological community to take seriously harmful effects arising from individual-based crime prevention programs. Building on these works, two key questions are of central interest to this paper: What has been the state of research on harmful effects of these crime prevention programs since McCord’s works? And what are the theoretical, methodological, and programmatic characteristics of individual-based crime prevention programs with reported harmful effects?

Methods

This paper reports on the first empirical review of harmful effects of crime prevention programs, drawing upon 15 Campbell Collaboration systematic reviews. Altogether, 574 experimental and quasi-experimental studies (published and unpublished) with 645 independent effect sizes were reviewed.

Results

A total of 22 harmful effects from 22 unique studies of individual-based crime prevention programs were identified. Almost all of the studies have been reported since 1990, all but 2 were carried out in the United States, and two-thirds can be considered unpublished. The studies covered a wide range of interventions, from anti-bullying programs at schools, to second responder interventions involving police, to the Scared Straight program for juvenile delinquents, with more than half taking place in criminal justice settings. Boot camps and drug courts accounted for the largest share of studies with harmful effects.

Conclusions

Theory failure, implementation failure, and deviancy training were identified as the leading explanations for harmful effects of crime prevention programs, and they served as key anchors for a more focused look at implications for theory and policy. Also, the need for programs to be rigorously evaluated and monitored is evident, which will advance McCord’s call for attention to safety and efficacy.     

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...     

Guardianship for crime prevention: a critical review of the literature

Cohen and Felson??s (Cohen and Felson American Sociological Review 44(4):588?C608, 1979) routine activity theory posits that for a crime to occur three necessary elements must converge in time and space: motivated offenders, suitable targets, and the absence of capable guardianship. Capable guardians can serve as a key actor in the crime event model; one who can disrupt, either directly or indirectly, the interaction between a motivated offender and a suitable target. This article critically reviews the literature on guardianship for crime prevention. Our specific focus is two-fold: (1) to review the way guardianship has been operationalized and measured, and (2) to review experimental and quasi-experimental evaluations and field tests of guardianship. Research on routine activities has had an uneven focus resulting in the neglect of the guardianship component (Reynald Crime Prevention and Community Safety 11(1):1?C20, 2009; Sampson et al. Security Journal 23(1):37?C51, 2010; Tewksbury and Mustaine Criminal Justice and Behavior 30(3):302?C327, 2003; Wilcox et al. Criminology 45(4):771?C803 2007). Evaluations of guardianship-related interventions demonstrate support for the theoretical construct; however, high-quality field tests of guardianship are wholly lacking. Implications for theory and research are discussed.     

Schools and the prevention of petty crime: Search for a missing link

Earlier research on the relation between school features and petty crime suggests that schools can intentionally influence the crime rate of the pupils. These findings were the starting point for a Dutch study at secondary schools of the same type in Dutch towns. The study focused on effects on the delinquency of third-year low-stream pupils (aged 15–17). For the study a control theory was formulated, a conditional control theory, which, in contrast to Hirschi's social control theory, recognizes possible delinquent influences of the pupils' network. In the study a strong statistical relation between integration of pupils in school and petty crime was found. However, I found almost no influence of the studied school features on integration and petty crime. These results led to the question whether the real important feature of schools had been neglected in the study. This seems not to be the case. A multilevel analysis shows that it is unlikely that there is major impact of schools on the integration of pupils, on delinquency, or on the relationship between integration and delinquency. This can be the result of special aspects of the Dutch school system and of the neglect of theory in earlier research.