The objective of this study was to adapt a Brazilian instrument for romantic jealousy assessment to the Portuguese cultural context, and to evaluate its psychometric properties. The adapted instrument was answered by 808 participants, divided in two equivalent samples regarding number and gender. Simultaneous factor analysis with those samples showed high similarity both with each other and with previous results obtained with a Brazilian sample. All factors showed reliability indices above 0.8. IRT based analysis revealed a good use of the response categories and showed that the majority of the scales are more discriminative for pathologic jealousy manifestation. It was concluded that the scale shows validity based on internal structure and good reliability, and can be recommended for research purposes.
Jealousy; Psychological assessment; Validity; Item Response Theory
