Psychometric properties and validation of the Polish adaptation of the Light Triad Scale

Background The aim of the study was to examine the development and structural validation of the Polish version of the Light Triad Scale, which measures three factors: Faith in Humanity, Humanism, and Kantianism. This tool reflects caring and beneficent orienta-tion toward other people, which is demonstrated in everyday behaviour. Participants and procedure The participants included 400 people aged between 18 and 80 (M = 29.17, SD = 10.60). To measure psychometric properties and for validation of the scale, we used the Polish Dirty Dozen scale and International Personality Item Pool-Big Five Aspect Scales. Results Confirmatory factor analysis, reliability analysis using α and ω coefficients, and two measures of validity (content and criterion validity) were applied. The statistical analyses confirmed an acceptable fit of the three-factor model. The α and ω reliability coef-ficients were satisfactory, with the highest value for Faith in Humanity, and the lowest one for Kantianism. The validity indices of CVR and CVI indicated that the Polish scale items fit well into the concept of the Light Triad. Conclusions Overall, the Polish version of the Light Triad Scale proved to be a valuable and reliable tool which presents an innovative ap-proach to measuring positive features of personality and behaviour. Our results demonstrated that the scale as a whole has good psychometric properties that allow its use in further research.