APPENDIX B: Scientific Evolution of the Project
DesignPHDCN is comprised of five components: (I) a Longitudinal Study (with an embedded intensive study of infants); (ii) a Community Survey; (iii) an Observational Study of Neighborhoods; (iv) a Neighborhood Expert Survey; and (v) Administrative Data; Neighborhoods were operationally defined as 343 clusters of city blocks from Chicago's 847 populated census tracts and then census data used to define 2 stratification variables: SES (3 levels) and racial/ethnic composition (7 levels) and the neighborhood clusters (NCs) were cross-classified by these 2 variables, and a stratified probability sample of 80 NCs was drawn for the Longitudinal Study
Sampleg744Longitudinal Study: Accelerated, longitudinal design with 7 cohorts from the prenatal period up to age 18, who are separated by 3 year intervals (0, 3, 6, 9, 12, 15, 18; ages at Wave 1); each cohort has approximately 1000 children, who are equally distributed by gender and of diverse racial and ethnic backgrounds (N = 6,234); Wave 2 response rate is 84%
Measuresg744Child: Exposure to violence, verbal IQ, reading achievement, behavior problems, efficacy and competence, provision of social relations, physical health and functional limitations, parent-child conflict, temperament, diagnostic interviews for depression, anxiety, and post-traumatic stress disorder, substance abuse, offending/delinquency, peers (older children and youth)
g744Longitudinal Study: Wave 1 was conducted in 1995-1996 and Wave 2 in 1997-1998; Wave 3 in 2000-2001
FundersNational Institute of Justice (NIJ), John D. and Catherine T. MacArthur Foundation, National Institute of Mental Health (NIMH), Administration for Children, Youth and Families (Head Start Bureau), Administration for Children, Youth and Families (Child Care Bureau), National Institute for Early Child Development and Education (NIECDE) / Office of Education Research and Improvement (OERI) of the U.S. Department of Education (D.Ed.)