RADEX STRUCTURE OF JACKSON BASIC PERSONALITY-INVENTORY

The sub-scale structure of Jackson's Basic Personality Inventory (Jack son, Manual for the Basic Personality Inventory, 1989) has been explor ed in a number of different investigations. The chief conclusions are that: (1) the sub-scales of the BPI are three-dimensional; (2) the thr ee factors are Psychiatric Symptomatology, Social Symptomatology, and Depression; (3) this structure is invariant over the populations studi ed to date. Conclusions made about structure, however, are a function of the technique employed. Conclusions (1)-(3) were reached via the tr aditional factor/component analysis program of investigation. In the p resent study facet analysis and multidimensional scaling were used in a reanalysis of BPI data from nine different samples. The results indi cated that the BPI is more satisfactorily portrayed as a two-dimension al radex (Guttman, Educational and Psychological Measurement, 17, 391- 407, 1957). Cross-sample invariance was still obtained. The discovery of the radex structure of the BPI suggests links to other circular cha racterizations of Personality and Psychopathology variables, several o f which were discussed.