We anticipated that a model with 5 to 7 first-order factors might provide a better fit to the data, given that the indicators from different inventories often measure similar dimensions of personality. To determine the structure most likely to achieve the best fit, an EFA was conducted on the 29 scales, again with Oblimin rotation. Six factors were retained with eigenvalues > 1. Model 6 was estimated as a freely covarying six-factor first-order solution suggested by the results of the EFA (Figure 3). Factor loadings of .30 and above from the EFA were used as the basis for freeing factor loadings in this model. This 6 factor structure appears to have two factors associated with the broader Extraversion domain, which we have tentatively labeled “Social Dominance” and “Social Vitality” following prior empirical work that has emphasized a similar distinction (Roberts, Walton, & Viechtbauer, 2006).
