Participants completed the Sensation Seeking Scale, a 40-item self-report questionnaire designed to measure differences in the degree to which individuals seek out stimulation and arousal (Zuckerman, 1984) at T1. The items are presented as 40 pairs of statements such as “I like wild uninhibited parties” and “I prefer quiet parties with good conversation.” For each pair, respondents chose the statement that best describes their likes or the way they feel. Scores were summed across items and ranged between 0 and 40, with higher scores indicating higher sensation seeking (α = .86).