Psychometric properties of the Russian version of the Perth Emotional Reactivity Scale-Short Form

Abstract

The Perth Emotional Reactivity Scale – Short Form (PERS-S) is a psycho-diagnostic tool that assesses ease of activation, intensity, and duration of negative and positive emotions. Objective of the study is to validate the Russian version of the PERS-S and to present its psychometric properties. Patients and methods. The validation study was performed on a non-clinical sample (268 participants, aged 18–55 years). The factor structure of the scale was verified with confirmatory factor analysis using the robust maximum likelihood estimation. Convergent and divergent validity were assessed based on the relationship between the PERS-S scales with the Positive and Negative Affect Schedule, the Perceived Stress Scale and the Emotional Reactivity scale (Formal Characteristics of Behaviour- Temperament Inventory). The Cronbach's alpha ( α ) was used to evaluate the reliability of the PERS-S. Results and discussion . The structural 6-factors model was consistent [ χ 2 /df=1.77; CFI=0.935; TLI=0.917; RMSEA=0.060 (90% CI: 0.047–0.073); SRMR=0.058]. The 6-factors model with 2 two major factors showed satisfactory results [ χ 2 /df=2.19; CFI=0.894; TLI=0.875; RMSEA=0.074 (90% CI 0.062–0.086); SRMR=0.092]. The reliability of the PERS-S was high for the two composite scales and five subscales ( α >0.70). The reliability of the «Positive-intensity» subscale was satisfactory ( α =0.58). The analysis of psychometric properties of the two tested models indicated the possibility of using the PERS-S six correlated subscales as well as the PERS-S with two composite scales, each of which consists of three subscales, in scientific research and clinical practice. Conclusion. The Russian version of the PERS-S is a valid and reliable tool for measuring emotional reactivity and its aspects.