Abstract
The study sought evidence for the construct validity of the Impulsive scale of the Interpersonal Style Inventory (ISI), and its relation to Eysenck's extraversion. In study 1 a sample of 93 high-school boys completed the EPI, ISI measures of Impulsive and Sociable, and the Buss-Plomin Impulsive scale. Correlations of ISI Impulsive with the other two scales emerged as .50 or higher while relations with EPI extraversion was .36. In Study 2, 45 delinquent boys completed inventory measures of impulsiveness, orderliness, persistence, risk-taking, and tempo. The boys were also rated by counselors on an impulsive scale. The counselor ratings correlated at a significant level with self-report scores. The ISI Impulsive scale could be distinguished from the other four self-report scales.
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