We also conducted similar analyses using the scales from the 6fpq, the 16pf, the NEO-PI-R, the HEXACO-PI, and the MPQ given that previous research suggests that these inventories have a reasonably well defined higher-order structure ranging from 3 to 6 factors each. A total of 99 personality scales were used for this analysis (18 from the 6fpq, 16 from the 16pf, 24 from the HEXACO-PI, 11 from the MPQ, and 30 from the NEO-PI-R; N = 956; covariance matrix available at www..edu). Seventeen eigenvalues for the sample correlation matrix were above 1. Once again, an inspection of the scree plot and the interpretability of several solutions suggested a Big Five structure. As before, the inter-factor correlations for the five factor model were modest (E and O: .22; E and N: −.14; E and A: .03; E and C: .07; O and N: −.17; O and A: −.20; O and C: −.05; N and A: .07; N and C: −.17; A and C: −.01). We then submitted this matrix to a second maximum likelihood EFA and attempted to extract higher-order factors.
