Personality and aggressive behavior. Psychological Bulletin (Vol. 132, 2006) reported on a study linking personality and aggressive behavior. Four of the variables measured in the study were aggressive behavior, irritability, trait anger, and narcissism. Pairwise correlations for these four variables are given in the following table.

Aggressive behavior–irritability: .80 Aggressive behavior–trait anger: .48 Aggressive behavior–narcissism: .50 Irritability–trait anger: .57 Irritability–narcissism: .16 Trait anger–narcissism: .13

a. Suppose aggressive behavior is the dependent variable in a regression model and the other variables are independent variables. Is there evidence of extreme multicollinearity? Explain.

b. Suppose narcissism is the dependent variable in a regression model and the other variables are independent variables. Is there evidence of extreme multicollinearity?

Explain.