Development of a new abbreviated form of the Junior Eysenck Personality Questionnaire-Revised

This work aims to develop a new version of the Junior Eysenck Personality Questionnaire-Revised-Abbreviated (JEPQR-A) with improved measurement properties. Two studies were carried out and various analyses performed. In the first study, the 89 items of the full version of the questionnaire were administered to a sample of participants (N = 549) and the data analysed in order to select the 24 items with the best metric properties. An investigation of the parameters of the 2PL model, DIF statistics and item fit measures allowed the selection of 24 items that were unbiased, well discriminating and well fitting. In the second study, the reliability, factor structure and convergent validity of the new abbreviated questionnaire were evaluated on a different sample of participants (N = 234). The results suggest that the new version of the JEPQR-A outperforms the previous form.