This study included 69 undergraduates (55% female; mean age = 20.7 years [SD =1.8] who were enrolled in a larger study of genetic and cognitive influences on drinking behavior at the University of Washington. Participants who enrolled in the parent study and reported lifetime alcohol use were invited to participate in a follow-up study to complete IAT measures. Because ALDH2*2 is nearly exclusive to northeast Asian populations, inclusion criteria for the parent study included full Chinese, Korean or Japanese ethnicity (n = 48, 18 and 3, respectively, for the current analyses). Further details on recruitment procedures and baseline characteristics for the full sample can be found in Hendershot et al. (2009). Because participants’ ALDH2 status had been ascertained as part of the parent study, we used prospective genotyping to recruit roughly equal numbers of participants with the ALDH2*1/*1 (n = 33) or ALDH2*1/*2 (n = 36) genotypes for the current study. A third group, ALDH2*2 homozygotes, was not targeted for this follow-up study due the low frequency of the ALDH2*2/*2 genotype and very low alcohol consumption rates in this group.
