The Personality Assessment Inventory (PAI; Morey, 1991) is a 344‐item self‐report inventory that assesses various domains of personality and psychopathology among adults and was designed for use in professional and research settings. Items are answered on a 4‐point Likert‐type scale according to the extent to which they reflect true descriptions of client experiences. These items are then combined into 22 nonoverlapping full scales, including 4 validity scales, 11 clinical scales, 5 treatment consideration scales, and 2 interpersonal scales (see Table 1). As shown in Table 1, 10 of the full scales contain conceptually derived subscales that were designed to facilitate interpretation and coverage of the clinical constructs. Administration of the inventory takes approximately 50–60 minutes, and test takers should have a reading ability at the fourth‐grade level.

The principle of complementarity asserts that the interpersonal behaviors of interaction partners tend to complement each other by encouraging partners to act similarly in terms of warmth and opposite in terms of dominance. The current study applied Sadler's computer joystick tracking device (originally designed to assess personality perception) to examine complementarity. Sixty‐six unacquainted females were videotaped during an unstructured dyadic interaction, and their warmth and dominance behaviors were coded using the joystick. Results indicated that both partners tended to alter their behaviors in a complementary manner. In addition, partners who complemented each other in terms of warmth tended to like each other more and performed tasks more accurately and quickly than dyads who were not as complementary on this dimension.