A brief assessment of the interpersonal circumplex

Three studies are presented that demonstrate the psychometric properties and initial validation of the International Personality Item Pool–Interpersonal Circumplex (IPIP-IPC). The IPIP-IPC is a brief 32-item assessment of the interper-sonal cirucmplex designed to be used when time is limited or when participants have difficulty understanding the adjec-tive items used in more traditional assessments of the interpersonal circumplex. In Study 1, 501 participants were examined to develop the IPIP-IPC and demonstrate the circular structure of the IPIP-IPC scales and their relation to the five-factor model of personality. Study 2 included 274 participants to reconfirm the circular structure of the IPIP-IPC scales. Finally, in Study 3, 100 participants again reconfirm the circular structure of the IPIP-IPC scales and demonstrate the overlap of the IPIP-IPC with a commonly used assessment of the circumplex: the 64-item Interpersonal Adjective Scale. Overall, the results suggest that the IPIP-IPC provides a relatively short, quick, and valid assessment of the inter-personal circumplex while maintaining many of the psychometric properties of longer assessment tools