Study
Wheeler and colleagues (2004) used a randomized factorial design to evaluate the efficacy of the Victim Impact Panel (VIP) component of the San Juan County (N.M.) DWI First Offenders Program (SJC-DWI). All participants were court-defined, first-time DWI offenders from a rural county that includes portions of two Native American reservations. As part of the broader program, the participants live in a minimum security jail setting with restricted movement and contact for 28 days.
The participants were randomly assigned to either 1) the treatment group (n=56), which received the standard SJC-DWI program and attended the VIP; or 2) the control group (n=43), which received the standard program, but did not attend the VIP. A total of 13 participants in the no-VIP group, who reported attendance at a VIP (e.g., for a previous DWI offense), were censored. Both groups were assessed at pretest, posttest (i.e., just prior to release), and at 2 months following completion of the program. Because of the low response rates at posttest, the study authors used only the 2-month follow-up data for analysis.
The participants were mostly male (68 percent) and Native American (54 percent). Of the other participants, 30 percent were non-Hispanic white, 11 percent were Hispanic, and 5 percent were African American. In regard to prior DWI arrests, a total of 63 percent had one prior DWI arrest, 18 percent had two, 18 percent had 3, and 2 percent had no prior DWI arrests.
The VIP and no-VIP groups were compared on characteristics that included age, gender, ethnicity, marital status, and prior and subsequent DWI arrests. Results of the chi-square analysis indicated no significant difference between the groups at baseline (African Americans could not be included in this analysis because of the small number of participants: there were only five across both VIP and no-VIP groups).
Trained staff of the SJC-DWI program administered the assessment measures on site; however, at 2 months, a follow-up questionnaire was mailed to all participants. Intake measures gathered information on demographics, quantity/frequency of alcohol use, and driving following drinking. The 2-month follow-up questionnaires (completed by 83 percent of participants), assessed quantity/frequency of alcohol use, driving following drinking, and questions regarding attendance at VIPs. Official driving records kept by the New Mexico Department of Traffic Safety were used to assess arrest.
A MANOVA was used to address whether there was a difference in drinking and driving behavior (i.e., drinking in the prior 60 days, days with five or more drinks, driving after five or more drinks) between the VIP and no-VIP groups. Follow-up chi-square analyses were also conducted with each of the 2-month outcomes. Finally, a chi-square analysis was conducted to assess the 2-year DWI recidivism rate for VIP and no-VIP participants.