Validity and Reliability of the Situational Judgment Test Instrument for Assessing the 'Pancasila' Student Profile

Character measurement has become increasingly relevant and needed in recent years due to its significant impact on individual success in various aspects of life. In the Indonesian context, the Pancasila Student Profile (PSP) is one set of character values being promoted in the curriculum. However, methods of character measurement such as self-assessment, peer assessment, and observation still have many limitations. The Situational Judgement Test (SJT) is a behavioral measurement tool with the advantage of reducing measurement bias. Therefore, this study aims to evaluate the psychometric properties, i.e. validity and reliability, of the SJT-based PSP measurement instrument. The sample size was 351 tenth-grade students. The research findings include an Aiken's V index of 0.684, Goodness of Fit statistics with χ²/df = 122.299/48, CFI = 0.938, TLI = 0.915, RMSEA = 0.066, and SRMR = 0.046, all within the good fit category. The empirical data of PSP align with the GRM model, with item fit MNSQ method showing 59 items fitting the GRM model and item fit MNSQ method. The PSP instrument has a Construct Reliability (CR) of 0.967 and an average variance explained (AVE) of 0.830. These findings contribute theoretically and practically to the field of measurement, indicating that the SJT-based instrument is valid and reliable for measuring PSP.