All analyses were performed using the SAS statistical package version 9.1. Variables were first checked for distributional assumptions. Group comparisons on demographic and other individual difference measures were conducted using independent-samples t-tests for continuous variables and chi-square tests for categorical variables (see Table 1). Generalized Estimating Equations (GEE; Zeger et al., 1988) were performed to examine the relationship between genotype and subjective responses to alcohol. The unit of analysis was participants’ begin and end drink observations.
