Credentialing examination developers rely on task (job) analyses for establishing inventories of task and knowledge areas in which competency is required for safe and successful practice in target occupations. There are many ways in which task-related information may be gathered from practitioner ratings, each with its own advantage and…

This article discusses the range of validation studies conducted in Kansas in examining the validity of the National Teachers' Examination as a certification test for that state. It is argued that the validation of certification tests calls for a wider range of studies than typically are undertaken. (JAZ)