Introduction: The vital role of emotion regulation and expression, especially in the context of adapting to breast cancer—has been widely recognized in recent years.
Objective: This study aimed to assess the psychometric properties of the Persian version of the Positive Emotion Dysregulation Scale.
Method: This research followed a descriptive-applied design and was categorized as a psychometric study. The statistical population included all women diagnosed with breast cancer who were referred to Shahid Motahari Clinic in Shiraz. A purposive sample of 200 women was selected to complete the study instruments. To evaluate the validity and reliability, factor loadings, average variance extracted (AVE), cross-loadings, the Fornell–Larcker criterion, and Cronbach’s alpha were used. Data were analyzed using SmartPLS-3 and SPSS version 26.
Results: The model demonstrated a good fit, and both convergent and discriminant validity were confirmed. The factor loadings for the subscales of acceptance, goals, and impulse were 0.69, 0.83, and 0.80, respectively. Reliability of the scale—calculated through Cronbach’s alpha, composite reliability, and rho-A—was 0.88, 0.90, and 0.89, respectively, all exceeding the acceptable threshold of 0.70.
Conclusion: The 13-item Positive Emotion Dysregulation Scale showed acceptable validity and reliability in women with breast cancer. Given the importance of positive emotions in the disease process, the availability of this scale can greatly aid in assessing and exploring the role of positive emotion dysregulation in the population. Therefore, its use is recommended for psychological screening and therapeutic interventions among the patients.