after adding a constant of one to normalize skewed distributions.4 The self-report alcohol use measures used in the current study are widely used in the literature on college drinking and have been found to be reliable when corroborated by collateral reports (Borsari & Carey, 2005; Marlatt et al., 1998). Other studies of college student drinking and related problems have shown that use of collateral reports does not improve validity of the data (Carey et al., 2006; Marlatt et al., 1998).
