Generalizability Coefficient

The generalizability coefficient is a metric used to evaluate how reliably a test or measurement reflects what it's intended to measure across different situations, examiners, or times. Think of it as a measure of consistency—higher values indicate more dependable results that can be generalized or applied confidently beyond the specific testing conditions. It considers various sources of variability, such as different raters or testing times, to assess overall trustworthiness. Essentially, it helps determine if the scores are stable and meaningful enough to inform decisions or judgments in real-world settings.