Question: Do cocaine abusers have radically different personalities than non-abusing college students? This was one of the questions researched in Psychological Assessment (June 1995). ZuckermanKuhlmans Personality

Do cocaine abusers have radically different personalities than non-abusing college students? This was one of the questions researched in Psychological Assessment (June 1995). Zuckerman€“Kuhlman€™s Personality Questionnaire (ZKPQ) was administered to a sample of 450 cocaine abusers and a sample of 589 college students. The ZKPQ yields scores (measured on a 20-point scale) on each of five dimensions: impulsive€“sensation seeking, sociability, neuroticism€“anxiety, aggression€“hostility, and activity. The results are summarized in the accompanying table. Compare the mean ZKPQ scores of the two groups on each dimension, using a statistical test of hypothesis. Interpret the results at Î± = .01.

Cocaine Abusers (n 450) ZKPQ Dimension Mean Std. Dev. Mean Std. Dev. College Students (n 589) Impulsive-sensation 94 9.5 4.4 seeking Sociability Neuroticism-anxiety 8.6 5.1 Aggression-hostility 8.63.9 Activity 10.4 4.3 12.54.0 4.6 4.1 4.1 9.1 7.3 8.0 11 3.4

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