Because studies examining youth drug use often have data with a high proportion of zeros, they often do not meet the assumptions for univariate or linear regression analyses that are typically used. We demonstrate the use of zero-inflated negative binomial regression models to address excessive zeros in drug use frequency on perceptions of…

The present study was an investigation of the potential moderating effect of social support on academic performance for students living in poverty. Data were collected in one urban middle school from 164 primarily Hispanic students using the Child and Adolescent Social Support Scale (CASSS; Malecki, Demaray, & Elliott, 2000) and students' course…