Abstract
This paper presents the psychometric properties of the Polish version of the Infant Behavior Questionnaire—Revised (IBQ-R). A group of 396 pairs of parents was studied, and a 3-factor structure of IBQ-R emerged with differences comparing to the original U.S. sample and a prior replication Russian sample. Analyses demonstrated satisfactory internal consistency and high consistency rating between both parents' scores. Additionally, a comparison of the scores of IBQ-R scales between Polish and previously reported U.S. data was made, showing that Polish infants scored higher on negative affectivity scales and lower on surgency/extraversion and orientation/regulation scales.
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