Researchers have been making use of ecological momentary assessment (EMA) and other study designs that sample feelings and behaviors in real time and in naturalistic settings to study temporal dynamics and contextual factors of a wide variety of psychological, physiological, and behavioral processes. As EMA designs become more widespread,…

A structural equation modeling approach to scale reliability evaluation can be employed to estimate generalizability theory indexes in settings where sampling of subjects and conditions is carried out. In one- and two-facet crossed designs, it is demonstrated how this method can be used to obtain estimates of relative generalizability…

Generalizability theory is described as a way to provide a unified framework for examining the dependability of measurements in the health sciences. Generalizability theory is appropriate whether the measurement is norm- or criterion-referenced, an individual or aggregate-level variable, and it is useful when there are single or multiple sources…

The Interrater/Test Reliability System (ITRS) is described. The ITRS is a comprehensive computer tool used to address questions of interrater reliability that computes several different indices of interrater reliability and the generalizability coefficient over raters and topics. The system is available in IBM compatible or Macintosh format. (SLD)