Cross-national measurement invariance of the Perseverative Thinking Questionnaire for clinical psychology professionals and trainees

Sample of 475 clinical psychology professionals and trainees from Colombia, Mexico, and Peru. The PTQ-CPT (9 items) showed unidimensional structure with correlated errors, metric invariance across countries, and validity evidence: it correlated positively with depression and anxiety and negatively with confidence in clinical skills. It is a reliable and valid measure of RNT for cross-cultural research and practice.