Psychometric Properties and Measurement Invariance of the Positive Youth Development Scale - Turkish Version.

In this study, we translated to Turkish and evaluated the validity, reliability, and measurement invariance for respondent sex, grade level and analysis programs the Short Form and Very Short Form of the Positive Youth Development Scale (Turkish version). We had 435 youth, aged 11-17 years, complete the Short (34 items) and Very Short (17 items) Forms of the instrument. Confirmatory factor analysis revealed that both forms had a 5-factor structure, and validity testing showed good criterion-related correlation validity between this tool and the Satisfaction with Life Scale. The Short Form had adequate reliability coefficients, but the Very Short Form lacked sufficient reliability for some dimensions. Test-retest correlations were satisfactory for both forms. While the Short and Very Short Forms showed measurement invariance across gender and grade level, CFI, NNFI (TLI), and IFI values diverged between LISREL and AMOS analysis programs. In summary, our data suggest that the Short Form is a reliable measure of positive youth development, while the Very Short Form may not be as reliable due to insufficient confidence values.