Circumplex structure of personality traits measured with the IPIP-45AB5C questionnaire in Poland

• Polish adaptation of IPIP-45AB5C questionnaire shows good reliability and validity.
• Personality traits operationalized in the Five Factor Model and the AB5C model are basically the same.
• Circumplex structure of lower order personality traits predicted by the AB5C model was confirmed.

According to the Abridged Big Five-Dimensional Circumplex (AB5C) model (Hofstee, De Raad, & Goldberg, 1992), there are five basic personality traits (similar to the hierarchical Five Factor Model; Costa & McCrae, 1992); however, the lower-level traits are organized in a circular way (in contrast to the hierarchical Five Factor Model). This study was conducted to verify the two main hypotheses assumed by the AB5C model: (1) the basic traits conceptualized in the hierarchical and circular models are similar, and (2) the lower-order traits of the AB5C model are circularly organized. The research was conducted in Poland on a group of 913 participants. The first hypothesis was verified in an analysis of multi-trait multi-method matrix. The second hypothesis was verified in second-order confirmatory factor analysis.