To enhance rapport and cultural understanding, African American students and community members served as field researchers to collect pretest, posttest, and long-term follow-up data. During each wave of data collection, the field researchers, who were blind to the families’ group assignments, made one home visit lasting 2 hours to each family. Well-established procedures for the study of the development of risk behaviors were used, including computer-based interviewing, matching of researchers and participants by ethnicity, and reassurance concerning confidentiality of the data (Murry & Brody, 2004). Each interview was conducted privately, with no other family members present or able to overhear the conversation. Youths provided data on their own past-month substance use and caregivers provided data on their own intervention-targeted parenting practices. Genetic data were obtained from youths and caregivers using procedures developed in partnership with rural African American community members (Brody et al., 2004).
