Psychometric Properties of the Prosocial Tendencies Measure- Revised (PTM-R) Among Adolescents in East Java, Indonesia

Objective: The Prosocial Tendencies Measure Revised (PTM-R), developed by Carlo and Randall (2002), is a widely used tool to assess prosocial behaviors across six distinct dimensions, particularly among adolescents in East Java, Indonesia. Methods and Materials: This study was designed to test the validity of prosocial behavior in adolescents. The study participants were 495. Researchers used confirmatory factor analysis to test the constructs of the Indonesian version of the PTM-R. Findings: The Indonesian version of the PTM-R demonstrated a good fit for the six proposed dimensions. The results indicated that the Indonesian version of the PTM-R demonstrated a good fit for the six proposed dimensions: Public, Anonymous, Dire, Emotional, Compliant, and Altruism (RMSEA = 0.080, CFI = 0.0.863, TLI = 0.842, and SRMR = 0.062). Reliability analysis showed strong internal consistency with a Cronbach's alpha of 0.92, and Rasch analysis revealed item reliability of 1.00 and person reliability of 0.90. Conclusion: These findings provide robust evidence for the validity and reliability of the PTM-R as an effective tool for assessing prosocial tendencies among adolescents in Indonesia.