Showing papers in "Journal of Experimental Criminology in 2016"

A meta-analysis update on the effects of early family/parent training programs on antisocial behavior and delinquency

Abstract: To update Piquero et al.’s meta-analysis on early family/parent training programs. Screening of eligible studies was carried out for the period between January 2008 and August 2015. An additional 23 studies were identified, which were added to the original database of 55 studies, totaling an overall sample of 78 eligible studies. A random-effects model was used to obtain an overall mean effect size estimate. Additional analyses were performed to assess publication bias and moderation. An overall average, positive, and significant effect size of 0.37 was calculated, which corresponds to 32 out of 100 in a treated group versus 50 out of 100 in a control group who offended. There was some evidence of publication bias and moderation. Early family/parent training programs are an effective evidence-based strategy for preventing antisocial behavior and delinquency.

A meta-analysis update on the effectiveness of early self-control improvement programs to improve self-control and reduce delinquency

Abstract: To update Piquero et al.’s (Justice Quarterly 27:803–834, 2010) meta-analysis on early self-control improvement programs. Screening of eligible studies was carried out for the period between January 2010 and September 2015. An additional seven studies were identified, which were added to the original database of 34 studies, totaling an overall sample of 41 eligible studies. A random effects model was used to obtain an overall mean effect size estimate. Additional analyses were performed to assess publication bias and moderation. Overall average, positive, and significant effect sizes were observed for improving self-control (0.32) and reducing delinquency (0.27). There was evidence of publication bias for the self-control improvement outcomes, as well as some evidence of moderation for both self-control improvement and delinquency outcomes. Early self-control improvement programs are an effective evidence-based strategy for improving self-control and reducing delinquency.

Report: increases in police use of force in the presence of body-worn cameras are driven by officer discretion: a protocol-based subgroup analysis of ten randomized experiments

Abstract: Our multisite randomized controlled trial reported that police body-worn cameras (BWCs) had, on average, no effect on recorded incidents of police use of force. In some sites, rates of use of force decreased and in others increased. We wanted to understand these counter-intuitive findings and report pre-specified subgroup analyses related to officers’ discretion on activating the BWCs. Using pre-established criteria for experimental protocol breakdown in terms of treatment integrity, ten experimental sites were subgrouped into “high-compliance” (no officer discretion applied to when and where BWCs should be used; n = 3), “no-compliance” (treatment integrity failure in both treatment and control conditions; n = 4), and tests where officers applied discretion during treatment group but followed protocol in control conditions only (n = 4). When officers complied with the experimental protocol and did not use discretion, use of force rates were 37 % lower [SMD = (−.346); SE = .137; 95 % CI (−.614) – (−.077)]; when officers did not comply with treatment protocol (i.e., officers chose when to turn cameras on/off), use of force rates were 71 % higher [SMD = .392; SE = .130; 95 % CI (.136) – (.647)], compared to control conditions. When full discretion (i.e., overall breakdown of protocol) was applied to both treatment and control conditions, null effects were registered [SMD = .009; SE=.070; 95 % CI (−.127) – (.146)], compared to control conditions. BWCs can reduce police use of force when then officers’ discretion to turn cameras on or off is minimized—in terms of both case types as well as individual incidents. BWCs ought to be switched on and the recording announced to suspects at early stages of police–public interactions. Future BWCs tests should pay close attention to adherence to experimental protocols.

Predictions put into practice: a quasi-experimental evaluation of Chicago’s predictive policing pilot

Abstract: In 2013, the Chicago Police Department conducted a pilot of a predictive policing program designed to reduce gun violence. The program included development of a Strategic Subjects List (SSL) of people estimated to be at highest risk of gun violence who were then referred to local police commanders for a preventive intervention. The purpose of this study is to identify the impact of the pilot on individual- and city-level gun violence, and to test possible drivers of results. The SSL consisted of 426 people estimated to be at highest risk of gun violence. We used ARIMA models to estimate impacts on city-level homicide trends, and propensity score matching to estimate the effects of being placed on the list on five measures related to gun violence. A mediation analysis and interviews with police leadership and COMPSTAT meeting observations help understand what is driving results. Individuals on the SSL are not more or less likely to become a victim of a homicide or shooting than the comparison group, and this is further supported by city-level analysis. The treated group is more likely to be arrested for a shooting. It is not clear how the predictions should be used in the field. One potential reason why being placed on the list resulted in an increased chance of being arrested for a shooting is that some officers may have used the list as leads to closing shooting cases. The results provide for a discussion about the future of individual-based predictive policing programs.

“Soft” policing at hot spots—do police community support officers work? A randomized controlled trial

Abstract: To determine whether crime-reduction effects of increased police patrols in hot spots are dependent on the “hard” threat of immediate physical arrest, or whether “soft” patrols by civilian (but uniformed) police staff with few arrest powers and no weapons can also reduce crime. We also sought to assess whether the number of discrete patrol visits to a hot spot was more or less important than the total minutes of police presence across all visits, and whether effects based on counts of crime would be consistent with effects on a Crime Harm Index outcome. We randomly assigned 72 hot spots into 34 treatment units and 38 controls. Treatment consisted of increases in foot patrol by uniformed, unarmed, Police Community Support Officers (PCSOs) who carry no weapons and hold few arrest powers beyond those of ordinary citizens. GPS-trackers on every PCSO and Constable in the city yielded precise measurements of all patrol time in all hot spots. Standardized mean differences (Cohen’s d), OLS regression model, and Weighted Displacement Quotient are used to assess main effects, to model the interaction effect of GPS data with treatment, and to measure the diffusion-of-benefits of the intervention, respectively. Outcomes included counts of incidents as well as the Cambridge Crime Harm Index. As intended, patrol visits and minutes by Police Constables were equal across the treatment and control groups. The sole difference in policing between the treatments groups was in visits to the hot spots by PCSOs, in both the mean daily frequency of discrete visits (T = 4.65, C = 2.66; p ≤ .001) and total minutes across all visits (T = 37.41, C = 15.92; p ≤ .001), approximately two more ten-minute visits per day in treatment than in control. Main effect estimates suggest 39 % less crime by difference-in-difference analysis of reported crimes compared to control conditions, and 20 % reductions in emergency calls-for-service compared to controls. Crime in surrounding areas showed a diffusion of benefits rather than displacement for treatment hot spots compared to controls. A “Reiss’s Reward” effect was observed, with more proactive patrols predicting less crime across treatment hot spots, while more reactive PCSO time predicted more crime across control hot spots. Crime Harm Index estimates of the seriousness value of crime prevented ranged from 85 to 360 potential days of imprisonment in each treatment group hot spot (relative to controls) by a mean difference of 21 more minutes of PCSO patrol per day, for a potential return on investment of up to 26 to 1. A crime reduction effect of extra patrols in hot spots is not conditional on “hard” police power. Even small differences in foot patrols showing the “soft power” of unarmed paraprofessionals, holding constant vehicular patrols by Police Constables, were causally linked to both lower counts of crimes and a substantially lower crime harm index score. Correlational evidence within the treatment group suggests that greater frequency of discrete PCSO visits may yield more crime reduction benefit than greater duration of those visits, but RCTs are needed for better evidence on this crucial issue.

Conclusions from the history of research into the effects of police force size on crime—1968 through 2013: a historical systematic review

Abstract: We describe and explain how the findings from nonexperimental studies of the relationship between police force size and crime have changed over time. We conduct a systematic review of 62 studies and 229 findings of police force size and crime, from 1971 through 2013. Only studies of U.S. policing and containing standard errors of estimates were included. Using the robust variance estimation technique for meta-analysis, we show the history of study findings and effect sizes. We look at the influence of statistical methods and units of analysis, and time period of studies’ data, as well as variation in police force size over time. Findings vary considerably over time. However, compared to research standards and in comparison to effect sizes calculated for police practices in other meta-analyses, the overall effect size for police force size on crime is negative, small, and not statistically significant. Changes in research methods and units of analysis cannot account for fluctuations in findings. Finally, there is extremely little variation in police force size per capita over time, making it difficult to estimate the relationship with reliability. This line of research has exhausted its utility. Changing policing strategy is likely to have a greater impact on crime than adding more police.

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

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

Juvenile drug court effects on recidivism and drug use: a systematic review and meta-analysis

Abstract: To conduct a meta-analysis of the effects of juvenile drug courts on general recidivism, drug recidivism, and drug use, and to explore variability in effects across characteristics of the drug courts and juvenile participants. We conducted a comprehensive literature search to identify randomized and controlled quasi-experimental studies that reported the effects of juvenile drug courts in the United States. Random-effects meta-analysis models were used to estimate mean odds ratio effect sizes, and meta-regression models were used to explore variability in effects. The literature search yielded 46 eligible evaluation studies. The meta-analysis found that, overall, juvenile drug courts were no more or less effective than traditional court processing, with mean effects sizes that were not statistically significant for general recidivism, drug recidivism, or drug use. There was statistically significant heterogeneity in those effect sizes, but none of the drug court or participant characteristics coded from the study reports were associated with that variability. However, the juvenile drug court evaluations were generally of poor methodological quality, with very few studies employing random assignment and many instances of substantial baseline differences between drug court and comparison groups. Juvenile drug courts were not found to be categorically more or less effective than traditional court processing for reducing recidivism or drug use. The great variability in effects, nonetheless, suggests that there may be effective drug courts, but no distinctive characteristics of the more effective courts could be identified from the descriptive information provided in the generally low quality research studies currently available.

The efficacy of foot patrol in violent places

Abstract: This study examines the effectiveness of foot patrol in violent micro-places. A large urban police department deployed foot patrol in micro-places (hot spots) for a period of 90 days for two shifts each day. Our objective is to determine whether this activity impacted violent crime in these hot spots and whether spatial displacement of crime occurred. Eight eligible foot beat locations were set by examining crime rates for previous years in order to identify micro-places of high criminal activity. We employed a quasi-experimental design comparing the four treatment to the four control areas, estimating panel-specific autoregressive models for 30 weeks prior to and 40 weeks after the treatment. Time series models revealed statistically significant reductions in violent crime in the micro-places receiving foot patrol treatment, while no such reductions were observed in the control areas. The deterrent effect, however, was short and dissipated quickly. Control areas did not experience any crime prevention benefit during this time period. No evidence of crime displacement to spatially contiguous areas was detected. This contributes to the growing body of knowledge that focused police strategies within hot spots impact violent crime. Specifically, the implementation of foot patrol in high crime hot spots led to measurable reductions in aggravated assaults and robberies, without displacing crime to contiguous areas.

Consequences of legal risk communication for sanction perception updating and white-collar criminality

Abstract: Scholars have long emphasized that communicating, or “advertising”, information about legal sanction risk is necessary for the success of deterrence-based crime policies. However, scant research has evaluated whether direct communications about legal risk can cause sanction perception updating, the updating of ambiguity in sanction perceptions, or changes in persons’ willingness to offend. No prior studies have evaluated sanction perception updating for white-collar crimes. To address this research void, the current study analyzes data from an experiment embedded in a recent national survey (N = 878). Multivariate regression models estimate the effect of providing participants with information about the “objective” arrest risk for white-collar offenses on their sanction perceptions. The findings provide the first evidence that such information, when it is inconsistent with individuals’ prior beliefs, causes them to update: (1) their perceptions of the certainty of arrest; (2) their ambiguity about arrest risk; and, indirectly, (3) their willingness to commit white-collar crimes. The results imply that individuals are willing to incorporate relevant information into their subjective beliefs about sanction risks. Importantly, however, they also make meaningful distinctions about the value of new information for understanding criminal risks.

Plea decision-making by attorneys and judges

Abstract: Approximately 95 % of convictions in the United States are the result of guilty pleas. Surprisingly little is known about the factors which judges, prosecutors, and defense attorneys consider in these decisions. To examine the legal and extralegal factors that legal actors consider in plea decision-making, we replicated and improved upon a 40-year-old study by asking legal actor participants to review a variety of case factors, and then make plea decisions and estimate sentences for pleas and trials (upon conviction). Over 1,500 defense attorneys, prosecutors, and judges completed an online survey involving a hypothetical legal case in which the presence of three types of evidence and length of defendant criminal history were experimentally manipulated. The manipulated evidence impacted plea decisions and discounts, whereas criminal history only affected plea discounts (i.e., the difference between plea and trial sentences). Defense attorneys considered the largest number of factors (evidentiary and non-evidentiary), and although legal actor role influenced the decision to plead, it did not affect the discount. In replicating a landmark study, via technological advances not available in the 1970s, we were able to increase our sample size nearly six-fold, obtain a sample representing all 50 states, and include judges. However, our sample was nonrepresentative and the hypothetical scenario may or may not generalize to actual situations. Nonetheless, valuable information was gained about the factors considered and weighed by legal actors.

Music therapy for improving mental health problems of offenders in correctional settings: systematic review and meta-analysis

Abstract: The aim of this review was to assess the effectiveness of music therapy on improving the mental health of offenders in correctional settings. Multiple databases and journals were searched to identify randomized controlled trials and quasi-randomized controlled trials of music therapy for offenders in correctional settings. Five studies (n = 409; predominantly male) were included in random-effects meta-analyses. Music therapy was effective for promoting offenders’ self-esteem (Hedges’ g = 0.55, p < 0.001) and social functioning (g = 0.35, p < 0.05). Effects on anxiety and depression depended on the number of sessions. For both outcomes, the studies with 20 or more sessions had larger effects than the study that had fewer than 20 sessions, and this difference was statistically significant (Q = 11.88, df = 1, p < 0.001, anxiety; Q = 9.16, df = 1, p = 0.002, depression). No significant effects were found on behavior management or between different music therapy approaches. Music therapy may be helpful for offenders to improve mental health. Future studies should consider including offenders of both genders, using larger sample sizes, and examining long-term effects. Publication bias may be an issue for this review given the small number of studies and the small sample sizes.

Social skills training for juvenile delinquents: Post-treatment changes

Abstract: To examine the post-treatment effectiveness of an outpatient, individual social skills training for juvenile delinquents in the Netherlands and to conduct moderator tests for age, gender, ethnicity, and risk of reoffending. The sample consisted of juveniles who received Tools4U, a social skills training with a parental component, as a penal sanction (N = 115). Propensity score matching was used to select a control group of juveniles receiving treatment as usual (TAU) of n = 108 juveniles (of a total of N = 354). Assessment of impulsivity, social perspective-taking, social problem-solving, critical reasoning, developmental task-related skills, and treatment integrity took place before and immediately after the treatment. Treatment integrity was found to be sufficient, so that treatment effects could be attributed to the Tools4U training. Tools4U was more effective than TAU in reducing impulsivity, cognitive distortions (self-centering and assuming the worst), and social perspective-taking deficits (hostile intent attribution). No treatment effects were found on adolescents’ social problem-solving skills, and only caretakers of girls showed improvement in parenting skills. Effects on developmental task-related skills were not in the expected direction: after Tools4U, juveniles reported significantly less social acceptance and self-worth than juveniles receiving TAU. Tools4U showed generally small effects and no effects on protective factors, which might limit the long-term treatment effects on delinquency. Treatment effects may be improved by implementing additional techniques and improving the parental component for boys in particular.

The continued importance of measuring potentially harmful impacts of crime prevention programs: the academy of experimental criminology 2014 Joan McCord lecture

Abstract: Joan McCord was a very influential criminologist and strong advocate for measuring potentially harmful effects in well-meaning crime prevention programs. This paper demonstrates the continued importance of measuring adverse program effects by reviewing the available research evidence on classic and contemporary gang streetworker programs. This paper draws upon the evaluation findings of existing gang streetworker evaluations and presents the unpublished results of a rigorous quasi-experimental evaluation of a contemporary gang streetworker program that directly measured whether the intervention impacted the violent gun behaviors of treated gangs relative to untreated gangs. Evaluations of classic pre-1970s gang streetworker programs generally found that these interventions increased gang delinquency by reinforcing group identity and enhancing gang cohesion. Evaluations of contemporary gang streetworker programs are mixed, with several studies documenting concerning increases in gang violence. An unpublished evaluation found that the streetworker program was well-implemented and executed. However, the intervention was associated with increased shootings by and against treatment gangs relative to control gangs. These findings suggest that contemporary gang streetworker programs are at high risk of generating unintended adverse outcomes for treated gang members relative to their untreated counterparts. Existing and planned programs should be monitored with a high degree of vigilance and evaluated with controlled evaluation designs.

The financial implications of merging proactive CCTV monitoring and directed police patrol: a cost–benefit analysis

Abstract: This study presents a cost–benefit analysis of an intervention pairing proactive CCTV monitoring with directed police patrol in Newark, NJ. A recent randomized control trial found that the strategy generated significant crime reductions in treatment areas relative to control areas. The current study focuses on the financial implications of the experimental strategy through a cost–benefit analysis. The study begins by measuring the costs and benefits associated with the experimental strategy, the findings of which can inform agencies with existing CCTV infrastructure. Follow-up analyses measure the costs and benefits of the intervention for agencies absent existing CCTV infrastructure, meaning a CCTV system would have to be funded in addition to the intervention outputs. Alongside overall benefits, this study presents the tangible cost savings afforded to the Criminal Justice system as well as to each of the separate criminal justice (CJ) system components: Policing, Courts, and Corrections. We found the experimental strategy to be highly cost effective for agencies with existing CCTV infrastructure. However, when the cost of the CCTV system is considered, the strategy is largely cost prohibitive. While the cumulative societal and criminal justice findings suggest some evidence of a modest cost savings, the strategy is highly cost prohibitive for each of the individual CJ system components when CCTV system costs are included. Results suggest that the experimental strategy is a worthwhile investment for agencies with existing CCTV infrastructure. Agencies absent CCTV may want to consider whether funds would be better allocated towards alternate strategies.

The “care package,” prison domestic violence programs and recidivism: a quasi-experimental study

Abstract: Although there are many evaluations of domestic violence rehabilitation programs, it is still unclear “what works” in this field, especially when it comes to programs within prison walls. Today, most studies indicate that domestic violence programs based on cognitive behavioral treatment, or psycho-educational models show small positive results. Yet, there is still insufficient empirical literature providing adequate evidence for the impact of integrative treatment, where different methods and approaches toward domestic violence prisoners are employed within the same rehabilitation-program framework while incarcerated. Our study examined the effects of an integrative domestic violence program with a therapeutic “package” implemented in Israel with the goal of reducing recidivism rates among prisoners in general, and especially with regard to violent offenses. Using propensity score matching methods, we compared treated offenders to a matched sample drawn from all convicted prisoners who were released from prison between 2004 and 2012. The findings indicate that the percentages of reincarceration and rearrests of inmates, who participated in integrative domestic violence program, were significantly lower during a period of up to 4 years after release. Our conclusion is that the integrative effect of different treatments along with a supportive prison climate increased the success of inmates who participated in the domestic violence program.

Missing person alerts: does repeated exposure decrease their effectiveness?

Abstract: Prospective person memory refers to situations where one is asked to be on the lookout for a missing or wanted individual. Some researchers have hypothesized that because people see missing person alerts for multiple people over a period of time, that people habituate to missing persons alerts much like they do to car alarms. The purpose of this research was to test that hypothesis. Some participants saw three different mock missing person videos, depicting three different target individuals, with one video being shown on each of 3 days (Monday, Wednesday, Friday). Other participants engaged in unrelated tasks on the first 2 days and saw a single mock missing person video on the third day. All participants were told that if they saw a person from a mock missing person video and contacted the experimenters they would win a cash prize. On the final day of the study, the target individual was located in the hallway a short distance from the experiment room in a location that participants had to pass on their way out of the building. Correct sightings of the target individual were significantly lower in the multiple video condition than in the single video condition. The results suggest that overuse of missing person alert systems can decrease their effectiveness in a manner consistent with a “car alarm” effect.

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

Abstract: 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. 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. 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. 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.

Offender-focused police intervention in residential burglary and theft from vehicle hot spots: a partially blocked randomized control trial

Abstract: To test an offender-focused police intervention in residential burglary and residential theft from vehicle hot spots and its effect on crime, arrests, and offender recidivism. The intervention was prevention-focused, in which detectives contacted offenders and their families at their homes to discourage criminal activity. The study was a partially blocked, randomized controlled field experiment in 24 treatment and 24 control hot spots in one suburban city with average crime levels. Negative binomial and ordinary least squares (OLS) regression were used to test the effect of the presence of intervention and its dosage on crime and offender recidivism, and examination of average and standardized treatment effects were conducted. The analyses of the hot spot impact measures did not reveal significant results to indicate that the treatment had an effect on crime or arrest counts, or on repeat arrests of the targeted or non-targeted offenders living in the hot spots. However, the relationships, while not significant, were in a promising direction. The collective findings from all four impact measures suggest that the intervention may have had some influence on the targeted offenders, as well as in the treatment hot spots. So, while the experimental results did not show an impact, they are promising. Limitations include large hot spots, the low case number, low base rates, and inadequate impact measures. Suggestions are provided for police agencies and researchers for implementing preventive offender-focused strategies and conducting studies in suburban cities.

The effect of imprisonment on recommitment: an analysis using exact, coarsened exact, and radius matching with the propensity score

Abstract: This study examines the effect of prison versus community sanctions on recommitment to prison and compares two levels of community supervision, community control (house arrest) and probation, evaluating whether the findings are contingent on the type of matching methods used in the analysis. Logistic regression was conducted on unmatched and matched samples. Exact, coarsened exact, and radius-matching procedures were used to create a selection on observables design. Matching variables included current offense, demographics, criminal history, supervision violations, and a rich set of Florida Sentencing Guidelines information culled from an official scoring sheet. Florida judges use this instrument to sentence offenders within the framework of the state determinate sentencing system. The results show that with exact matching, there is no effect of imprisonment on recommitment, while the other procedures suggest a specific deterrent effect of imprisonment. All four analysis methods showed that offenders under community control are more likely to reoffend than those under normal probation. Analyses between the matched and unmatched prison observations demonstrate that the matched set of prisoners is composed of offenders who have less extensive criminal records and less serious conviction offenses than unmatched offenders regardless of the matching algorithm. Contrary to a prior analysis of these data, which found a criminogenic effect of prison, a null effect was found using exact matching. Comparing the matching procedures, the more precise the match the less likely there was an effect of prison. However, community control was criminogenic regardless of the matching procedure.

A randomized clinical trial of tailored interventions for health promotion and recidivism reduction among homeless parolees: outcomes and cost analysis.

Abstract: Objectives This study conducted a randomized controlled trial with 600 recently released homeless men exiting California jails and prisons.

Information retrieval in systematic reviews: a case study of the crime prevention literature

Abstract: A defining feature of a systematic review is the data collection; the assembling of a meticulous, unbiased, and reproducible set of primary studies. This requires specialist skills to execute. The aim of this paper is to marshal tacit knowledge, gained through a systematic search of the crime prevention literature, to develop a ‘how-to guide’ for future evidence synthesists in allied fields. Empirical results from a recent systematic search for evidence in crime prevention are supplied to illustrate key principles of information retrieval. Difficulties in operationalizing a systematic search are expounded and possible solutions discussed. Empirical results from optimizing the balance between sensitivity and precision with the criminological literature are presented. An estimation of database overlap for crime prevention studies is provided to guide other evidence synthesists in streamlining the search process. A high-quality search will involve a substantial time investment in honing the research question, specifying the precise scope of the work, and trialing and testing of search tactics. Electronic databases are a lucrative source of eligible studies, but they have important limitations. The diversity of expression across the criminological literature needs to be captured by the use of many search terms—both natural language and controlled vocabulary—in database searches. Complementary search tactics should be employed to locate eligible studies without common vocabulary. Grey literature should be ardently pursued, for it has a central role in the crime prevention evidence base.

Breaking the cycle demonstration project: using a quasi-experimental analysis to test the “worst of both worlds” hypothesis and risk principle

Abstract: Objectives The purpose of this study was to test the “worst of both worlds” hypothesis and the risk principle in a sample of drug-involved offenders enrolled in the Breaking the Cycle (BTC) demonstration project, an intensive drug intervention implemented in Birmingham, Alabama, Jacksonville, Florida, and Tacoma, Washington.

The impact of two Los Angeles County Teen Courts on youth recidivism: comparing two informal probation programs

Abstract: This study sought to examine the impact of two Teen Courts operating in Los Angeles County, a juvenile justice system diversion program in which youths are judged by their peers and given restorative sentences to complete during a period of supervision. A quasi-experimental design was used to compare youths who participated in Teen Courts (n = 112) to youths who participated in another diversion program administered by the Probation Department (the 654 Contract program) (n = 194). Administrative data were abstracted from the probation records for all youths who participated in these programs between January 1, 2012 and June 20, 2014. Logistic and survival models were used to examine differences in recidivism, measured as whether the minor had any subsequent arrest or arrests for which the charge was filed. Comparison group participants had higher rates of recidivism than Teen Court participants, after controlling for age, gender, race/ethnicity, and risk level. While the magnitude of the program effects were fairly consistent across model specifications (odd ratios comparing Teen Court [referent] to school-based 654 Contract ranging from 1.95 to 3.07, hazard ratios ranging from 1.62 to 2.27), differences were not statistically significant in all scenarios. While this study provides modest support for the positive impact of Teen Court, additional research is needed in order to better understand how juvenile diversion programs can improve youth outcomes.

Juvenile curfew effects on criminal behavior and victimization: a Campbell Collaboration systematic review

Abstract: Objectives The aim of this review was to synthesize the evidence on the effectiveness of juvenile curfews in reducing criminal behavior and victimization among youth. Methods To be eligible, a study must have tested the effect of an official juvenile curfew ordinance instituted as a general preventive measure directed at all youth within a certain age range. All quantitative research designs that assessed the effect of the curfew on criminal behavior or victimization were eligible with the exception of simple pre–post designs with only a single crime rate pre and post the start of the curfew ordinance. To accommodate design differences, the effect size used in this synthesis was the percent change in the crime or victimization rate during the period of time with a curfew relative to a baseline period, adjusting for any linear time trend. The systematic search was conducted between January 20, 2014 and March 5, 2014. Thirteen documents representing ten unique studies were eligible and coded. Results The pattern of evidence suggests that juvenile curfews are ineffective at reducing crime and victimization. The mean effect size for juvenile crime during curfew hours was slightly positive (reflecting a slight increase in crime), whereas it was essentially zero for crime during all hours. Similarly, juvenile victimization also appeared unaffected by the imposition of a curfew ordinance.

To marry a thief? Crime type as a deterrent to cohabitation

Abstract: Using a vignette study, we investigated the relative attractiveness as cohabitation partners of five different types of offenders, male as well as female. Respondents advised a hypothetical person whether he or she should start cohabiting with his or her partner who had offended once. Gender and type of offence were systematically varied. Our findings suggest that violent offenders are equally attractive as serious property offenders. Against expectation, perpetrators of relational violence are not rated as less attractive than other violent offenders, even if they are male, and also when females are the raters. Male violent offenders are rated as less attractive cohabitation partners than female violent offenders. Sex offenders are the least attractive cohabitation partners, particularly those who had offended against a child. Crime type matters: sex offending impacted consistently negatively on cohabitation advice. This effect may be partly due to the fact that many regard sex offenders as incurable and ‘deviant.’ Violent offending did not elicit markedly negative advice. Perhaps it was considered less of a risk because of the message in the vignette that the prospective cohabitants had a good relationship. It may also be that many young people have been in a fight or have slapped someone in their lives, and, therefore, downplay the seriousness of this offence.

The introduction of CCTV and associated changes in heroin purchase and injection settings in Footscray, Victoria, Australia

Abstract: In June 2011, closed-circuit television (CCTV) was introduced in Footscray (a suburb of Melbourne, Australia) to help deter street-based drug trading. We investigate whether there were subsequent shifts in the settings (e.g., street, house) in which heroin was purchased or injected by people who inject drugs (PWID). Using heroin purchase data from the Melbourne Injecting Drug User Cohort Study, multinomial logistic models with fixed effects for CCTV introduction were used to estimate the percentage of: (1) heroin purchased on the street, from mobile dealers and in house settings; and (2) heroin injections occurring in street, car, public toilet, and house settings. Displacement effects were investigated with a logistic model capturing the likelihood of traveling to Footscray to purchase heroin. Following CCTV introduction, the percentage of heroin injections occurring in public toilet settings decreased by 13 % (95 % CI −27 %, −0 %). This was accompanied by a non-significant increase in the percentage of heroin injections in street settings of 23 % (95 % CI −1 %, +41 %). Changes in other settings were small and non-significant. No suburb displacement effects were found. The introduction of CCTV in Footscray may have displaced PWID who previously injected heroin in public toilets to street settings. Apart from this, Footscray’s street-based heroin market operates much as it did before CCTV.

Retrieving administrative data to assess long-term outcomes: a case study of the 23-year follow-up of the Milwaukee domestic violence experiment

Abstract: To describe how social scientists, criminal justice practitioners, and administrative agencies collected administrative data to follow-up a criminological experiment after two decades. To make recommendations that will guide similar long-term follow-ups. A case study approach describes the processes of and sociological benefits to collecting administrative data to assess criminal justice and life-course outcomes. While maintaining experimental integrity, we developed, executed, and verified processes to retrieve arrest, mortality, and residential data for the experimental subjects, which enabled us to complete the longest ever follow-up of a criminal justice experiment. When experiments have policy implications, administrative data may be preferable to survey data for assessing primary effects. Successful social science research can be conducted in conjunction with multiple administrative agencies.