<![CDATA[Growth mindset theory emphasizes the malleability of abilities through effort and learning. However, existing instruments are largely based on secular frameworks and may not fully capture the spiritual beliefs that shape how Muslim students interpret challenges and setbacks. This study developed and validated the Islamic Growth Mindset (IGM) Scale, a culturally grounded measure integrating ikhtiar (personal effort) and tawakkal (trust in Allah) within the broader framework of husnuzan. A mixed-method sequential design was used. Qualitative interviews informed item development, followed by psychometric validation with 265 Tahfiz students aged 13–15 years enrolled in Islamic boarding schools. Exploratory and confirmatory factor analyses supported a two-factor structure representing ikhtiar and tawakkal, with satisfactory model fit (χ²/df = 1.51, RMSEA = .044, CFI = .990). Rasch analysis further demonstrated good item functioning, strong item reliability (.99), and satisfactory internal consistency (Cronbach’s α = .83). The final 14-item IGM Scale provides a psychometrically sound measure of growth mindset within an Islamic psychological framework. As an culturally grounded instrument developed from Islamic psychological concepts rather than adapted from Western measures, it extends growth mindset theory by integrating personal effort with spiritual reliance on Allah and offers a practical tools for research and educational practice in Muslim contexts. ]]>
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