BACKGROUND: Persevering hope, defined as the ability to maintain motivation when goals seem unattainable, represents a crucial psychological resource for mental health. This study aimed to examine the psychometric properties of the Turkish version of the Persevering Hope Scale (PHS) primarily using Rasch analysis, supplemented by classical test theory indices including internal consistency reliability. METHOD: The study included 634 university students (72.9% female; Mage = 22.51 ± 4.08). Rasch analysis was employed to assess unidimensionality, item fit, and differential item functioning (DIF). Criterion-related validity was evaluated through correlations with the Adult Hope Scale, and convergent validity was examined using measures of theoretically related constructs and psychological health outcomes. RESULTS: Rasch analysis indicated that all items demonstrated good fit (infit/outfit MNSQ = 0.71-1.17), with no evidence of differential item functioning (DIF) across gender. Furthermore, the results supported the unidimensional structure of the PHS (explained variance = 67.1%). The scale showed strong criterion-related validity (rs = 0.41-0.56, p < 0.001). Convergent validity was supported by significant correlations with flourishing (r = 0.45, p < 0.001) and psychological health outcomes. CONCLUSIONS: The Turkish version of the PHS demonstrates robust psychometric properties with strong evidence of reliability, construct validity, and measurement invariance across genders. These findings support its use as a culturally valid instrument for assessing persevering hope in Turkish populations.
Kuşci et al. (Sat,) studied this question.