Evaluating Circumplex Structure in the Interpersonal Scales for the NEO-PI-3.

Scales to assess the eight octants and two axes of the interpersonal circumplex (IPC) using items from the revised NEO Personality Inventory were introduced by Traupman et al. Item changes in the revised and renormed third edition of the NEO instrument (NEO-PI-3) have affected item content in all eight octant scales, underscoring the need to reexamine the IPC scales. The current study examines the circumplex structure of the revised octant scales in the NEO-PI-3 and their correlations with the Dominance and Warmth scales of the Personality Assessment Inventory in 568 undergraduate students. The data show perfect fit to circumplex structure, suggesting equivalent or better assessment of the IPC with the NEO-PI-3 octant scales. Convergence of the eight octants with the Personality Assessment Inventory interpersonal scales further supports their saturation with interpersonal content and appropriate location within the IPC.