Based on the past work of Krueger and colleagues (Krueger, 1999; Krueger and Markon, 2006), we specified 1-3 factor solutions in the EFAs. Results of the EFAs for both current and lifetime samples produced 1 and 2 factor solutions; however, both analyses failed to compute a 3 factor solution because the model covariance matrices were not “positive definite.” Based on fit statistics and examination of eigenvalues, a two factor solution was chosen for both 12-month and lifetime diagnoses. For both samples, two of the seven eigenvalues were found to be larger than 1 with 55% of the variance being described by the first factor for both samples (eigenvalues = 3.88 and 3.87) with 75% and 76% of the variance in the seven diagnoses being explained by the first two factors in the current and lifetime samples, respectively.
