“…Jackson calculated the reliability of the questionnaire using Cronbach's alpha method for each of system as follows: 1.89 for behavioral activation system, 1.71, and 1.74 for the fight-flight-freeze. Hasani et al examined the validity of the Iranian version of this scale in terms internal consistency, correlation of items, test-retest, factor analysis, correlation between subscales, and criterion validity, with Cronbach's alpha ranging from 1.72 to 1.88, retest coefficients from 1.14 to 1.78 and the correlations of the total items between 1.18 to 1.28 (Fayazi, 2016).…”