Two batteries were used to assess impulsivity. Both were administered via ACASI using MediaLab (Jarvis, 2004). Failure to think before acting and problems associated with this tendency was measured using 13 yes/no questions derived from the Junior Eysenck Impulsivity Scale (Eysenck, 1985; Eysenck & Eysenck, 1977; Kuo, Chih, Soong, Yang, & Chen, 2004). This scale is highly similar to the motor impulsivity subscale of the Barratt Impusivity Scale (Patton, et al., 1995). Sensation seeking was assessed with 4 questions (e.g., I like to do frightening things) on a 4-point scale ranging from strongly agree to strongly disagree derived from Zuckerman’s Sensation Seeking Scale (Hoyle, Stephenson, Palmgreen, Lorch, & Donohew, 2002). The four items were selected from a larger battery that had been identified to represent the four dimensions of the Zuckerman scale. Preliminary factor analyses revealed that the Eysenck scale was composed of two highly correlated components (r = .52), one reflecting the tendency to act without thinking (Eysenck 1, alpha = .74) and the other the tendency to encounter problems when acting without thinking (Eysenck2, alpha = .51). We
