Test validity refers to the degree to which the inferences based on test scores are meaningful, useful, and appropriate. Thus, test validity is a characteristic of a test when it is administered to a particular population. This article introduces the modern concepts of validity advanced by S. Messick (1989, 1996, 1996). Traditionally, the means of…

Too few researchers understand what statistical significance testing does and does not do, and consequently their results are misinterpreted. This Digest explains the concept of statistical significance testing and discusses the meaning of probabilities, the concept of statistical significance, arguments against significance testing,…

A major survey of career and employment counseling in Canada was completed in 1993, with over 1600 counselors, department heads and managers of counseling centers, and regional directors working in career and employment counseling centers being polled. Survey results indicated: (1) there is a strong need for evaluation in all aspects of career…

This digest discusses the difficulty of assessing the speech and language of culturally and linguistically diverse students and recommends strategies for identifying communication disorders. It begins by reviewing what qualifies as a communication disorder, discussing the limitations of speech and language tests, and outlining test considerations.…