Reference no: EM132496124

Fifty-four native English-speaking healthy men ages 21 to 35 were recruited via newspaper ads (see Kirchner & Sayette, 2003, for details). Potential participants were excluded if they reported medical conditions that contraindicated alcohol administration, if they met the criteria for past alcohol abuse or dependence in the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV; American Psychiatric Association, 1994), if they were not within 15% of the ideal weight for their height, if they were illiterate, or if they reported smoking 15 or more cigarettes per day (to avoid having participants experience nicotine withdrawal during the study). To be invited to participate, the men had to report drinking an average of at least two drinks on at least one occasion per 2 weeks, or at least four drinks on at least one occasion per month, over the past year. Eligible participants were invited to an experimental session. They were told to avoid eating or drinking caffeine within 4 hr of the session, not to use alcohol or drugs within 24 hr of the session, and not to smoke for 1 hr prior to the session. They also were told that their breath would be measured to confirm compliance. Instructions explained that participants could not drive themselves from the study. Those needing transportation were provided with money for a taxi or bus. Participants were randomly assigned to one of two groups: Half received 0.82 g of alcohol per kilogram of body weight; half received a placebo

What sampling strategy did the researchers use to collect their data?