<![CDATA[Social support is a crucial psychosocial factor that contributes to individuals’ mental health and well-being, particularly during emerging adulthood when peer relationships become increasingly significant. Despite extensive research on social support, measurement of peer social support remains inconsistent and often lacks specificity and contextual relevance. This study aimed to develop a psychological measurement scale of peer social support based on five dimensions: emotional support, esteem support, tangible/instrumental support, informational support, and network support. The research employed a quantitative approach with an instrument development design focusing on content validity evaluation. A total of 30 items were constructed and assessed by four psychology experts using a relevance rating scale. Content validity was analyzed using Aiken’s V coefficient. The results indicated that Aiken’s V values ranged from 0.35 to 0.80, with 19 items meeting the validity threshold (V ≥ 0.60), consisting of highly valid and valid items, while 11 items were excluded. The findings suggest that the developed instrument demonstrates adequate content validity in representing the construct of peer social support, although some dimensions require further refinement. This study highlights the importance of systematic item development and expert evaluation in ensuring measurement accuracy. Future research is recommended to examine construct validity and reliability to establish the psychometric robustness of the scale.]]>
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