This article introduces the application of Generalizability Theory in assessing the reliability of job performance ratings. Generalizability Theory is frequently used in educational sciences and psychology. Basically, Generalizability Theory can be used to assess reliability in the presence of multiple sources of error. Also, it can be used to assess reliability in the presence of different types of sources of error. In this study, the application of Generalizability Theory in measurement involving multiple raters is considered in particular. Generalizability Theory seems like an ideal theory for examining multiple sources of error in job performance measurement. With this study, principles of Generalizability Theory are used in determining measurement errors that occur while evaluating job performance.

Keywords: Dependability, generalizability theory, job performance