Study
Peyton and colleagues (2019a) conducted a randomized clustered controlled trial to evaluate the effects of a community-oriented policing strategy on individual-level attitudes toward police in New Haven, Conn. The New Haven Police Department (NHPD) is an urban police department with 10 police districts. Study participants were identified and recruited from Aug. 15 to Sept. 6, 2018 (i.e., the recruitment period), using voter registration records that included mailing addresses for 49,757 residents.
During the recruitment period, the study authors mailed invitation letters to the addresses listed in residents’ voter registration records. Mailed letters asked residents to participate in an online survey (called the “New Haven Opinion Survey 2018”). Of the 49,757 potential residents, 2,013 residents in 1,852 households were included in the study sample based on their completion of the online survey and agreement to participate in follow-up surveys. Because residents (
n
= 2,013) were nested in households (
n
= 1,852), blocked random assignment was used to match households into quartets (i.e., groups of four houses) across 463 blocks. Household quartets were matched based on blocking variables (such as the proportion of residents above the median income level of $50,000–59,999, average household age, and proportion of residents indicating any prior arrest by the police department) and randomized to the intervention (
n
= 926) and control (
n
= 926) conditions. There were 1,007 individuals in intervention households and 1,006 individuals in the control households.
During the intervention period (Sept. 11 to Oct. 17, 2018), patrol officers attempted to contact all 1,007 individuals in intervention households. Individuals in control households did not receive any type of community-oriented policing intervention. Among the 1,007 persons assigned to the intervention, 412 were successfully reached at the door and received the community-oriented policing intervention, which included a brief (about 10-minute) conversation with a uniformed patrol officer from their district.
Of the individuals in intervention households, 62 percent were female, 57 percent were White, 19 percent were Black, 13 percent were Hispanic, and 11 percent were “Other” (Asian, Native American, Middle Eastern, multiracial, or another race or ethnicity). In the last 12 months (before the intervention), 39 percent of individuals had prior face-to-face contact with an officer from NHPD, 9 percent had previously been arrested by NHPD, and 14 percent reported prior unfair treatment by NHPD. The average age of individuals was 44 years, and the average household size was 1. Individuals in the control households were 62 percent female, 57 percent White, 20 percent Black, 12 percent Hispanic, and 11 percent “Other.” Of these individuals, 40 percent had face-to-face police contact with an officer in the last 12 months, 9 percent had previously been arrested, and 15 percent reported prior unfair treatment by NHPD. The average age of individuals was 44 years, and the average household size was 1. There were no statistically significant differences at baseline on background characteristics between individuals in intervention and control households.
In addition to data collected at baseline, two follow-up surveys (emailed online) were conducted 3 days (T1) and 21 days (T2) after the intervention. Outcomes of interests included overall attitudes toward police, willingness to cooperate and comply with police, perceptions of police performance and police legitimacy, confidence in police, perceived warmth toward police, and negative beliefs about police. All the outcomes, except for perceived warmth toward police, were measured by 19 questions derived from a larger, widely used 26-question survey (see Sunshine and Tyler 2003; Tyler et al. 2014; Tyler and Jackson 2014), using a seven-point scale (which ranged from Extremely Unlikely to Extremely Likely or Strongly Disagree to Strongly Agree, with a neutral midpoint). Perceived warmth toward police was measured using a 100-point “feeling thermometer” intended to tap into people’s feelings about the police. Negative beliefs about police were measured using a five-item scale of negative stereotypes about police as a group, with each item scored on a seven-point scale (e.g., “compassionate” (1) to “cold hearted” (7), with a neutral midpoint).
A linear regression analysis was used to estimate the intent-to-treat (ITT) effect to determine the differences between individuals in intervention and control group households, at the 21-day follow-up. Subgroup analyses were conducted to examine the impact of race on overall program effects.