This research aims to develop a valid and reliable cultural tolerance measurement scale to measure religious students' tolerance towards cultural differences. The research was carried out in the context of Indonesia, a country rich in cultural diversity. This scale development method follows the Rasch analysis approach. The first study was the identification stage of cultural tolerance dimensions, discussions with cultural experts, generalization of scale items, and target population judgment, which resulted in six scenarios and 48 items. The second item validation study employed Rasch for all generalization items and determined four scenarios and 16 items with higher validity. The third study finalized items using advanced Rasch analysis by trying out the final scale that had been determined. The final scale consists of 16 items derived from four scenarios, with each scenario comprising four items. These items were selected based on their prominent levels of validity and reliability, ensuring that they accurately measure the construct of cultural tolerance. Each item was rigorously tested, and only those with strong statistical support were included in the final scale.
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