The CSDP is a within-subject, double-blind, randomized-order study of responses to alcohol and placebo beverages in 190 young adult non-alcohol dependent drinkers. The study was approved by the University of Chicago Institutional Review Board. Initial laboratory testing was conducted March 2004-July 2006, and re-examination testing was conducted March 2009-October 2011. Participants returned for re-examination on average 63 months (±1.5 SD) after their initial assessment. Both testing phases included two 4½ hour individual sessions separated by at least 24 hours and conducted at the Clinical Addictions Research Laboratory at the University of Chicago. Participants completed measures before and after ingesting a blinded beverage that contained either 0.8 g/kg alcohol or placebo administered in random order at each phase.
