Figure 2. A structure of interpersonal behavior composed of four adjective-labeled dimensions, with the two predominant orthogonal dimensions labeled Agency and Affiliation. The figure illustrates that the interpersonal engagement characteristic of extraversion is composed of two different dispositions of affiliation and agency. Within the structure, lower-order traits representing either agency or affiliation components of extraversion are plotted according to their loadings on general Agency and Affiliation traits derived in several studies. See Appendix A for the identity of the abbreviations of trait measures (shown with numbers), the questionnaires to which the abbreviations correspond, and the studies providing the trait loadings.