Generalizability Theory as a Unifying Framework of Measurement Reliability in…

In adolescence research, the treatment of measurement reliability is often fragmented, and it is not always clear how different reliability coefficients are related. We show that generalizability theory (G-theory) is a comprehensive framework of measurement reliability, encompassing all other reliability methods (e.g., Pearson r, coefficient alpha and KR-20, intraclass correlation coefficients)…