The DSQ [32] gathers information about an individual’s alcohol use. This scale provides information about an individual’s alcohol use on a 5 point likert scale, including frequency of alcohol use (from I have never had a drink of alcohol to I drink alcohol almost daily) and quantity of alcohol use (from I don’t drink alcohol at all to I usually drink a lot of alcohol (more than 9 beers or drinks) on any given occasion). Problems associated with alcohol use (e.g., experiencing blackouts, having trouble with the law due to drinking, committing illegal acts while intoxicated, etc.) are also measured. The negative outcome composite scale includes 10 dichotomous items reflecting negative outcomes from consumption (e.g., hangovers, trouble with parents/friends/school, fights, illegal acts, etc.). The negative outcome composite had coefficient alphas of 0.79 and 0.84, respectively, on each time period assessment. Test-retest reliability for the scale measuring problems associated with use was .91 over a 4-week period in the developmental sample [32]. Stability estimates of the measures over the 8 month time period in this study were as follows: drinking quantity 0.68, drinking frequency 0.71, drinking problems 0.60.
