Objectives. The purpose of the study was to develop and validate a Czech version of the Self-Compassion Scale (SCS-CZ) and to examine its psychometric properties.
Sample and setting. Three separate Czech samples were used. In Survey 1, the SCS was translated into Czech with a back-translation procedure and then administered through an on-line survey. 5368 participants (sample 1) completed the SCS-CZ, two subscales of the FFMQ, the RSES, the SWLS and a scale measuring the intensity of non-clinical narcissism. In Survey 2, 415 participants (sample 2) completed the SCS-CZ, the BDI-II, the STAI X-2 and the UP-SRS. In Survey 3, 58 participants (sample 3) completed the SCS-CZ two times with the time interval of three weeks.
Statistical analysis. Using IBM SPSS Statistics-22 and Amos-23, calculations of descriptive statistics, Cronbach's alpha, Pearson correlation coefficients, test-retest analysis and confirmatory factor analysis were performed.
Results. The confirmatory factor analysis (sample 1) confirmed the six-factor structure of SCS-CZ after elimination of six items (SRMR=0.045, RMSEA=0.059, CFI=0.929, GFI=0.942, TLI=0.913). A single higher-order factor model was then also confirmed. The Cronbach's alpha coefficients for total SCS-CZ and subscales were as follows: SCS-CZ (alpha=0,89), self-kindness (alpha=0,86), self-judgment (alpha=0,67), common humanity (alpha=0,75), isolation (alpha=0,78), mindfulness (alpha=0,65) and over-identification (alpha=0,69). As expected, in Survey 1 and 2, the SCS-CZ exhibited a significant positive correlation to measures of mindfulness, self-esteem, life satisfaction and self-acceptance and a significant negative correlation to measures of non-clinical narcissism, depression and trait anxiety. In Survey 3, the SCS-CZ showed a test-retest reliability of 0.90.
Study limitation. This study relied exclusively on self-report measures in order to assess validity. The authors recommend the use of interviews as well as clinical or meditator samples in future studies.