The nature and common uses of standardized achievement tests are described and placed in context in order to evaluate claims and criticisms that are commonly made. Tests are described as samples of behavior and hence subject to sampling errors. Much of the debate is dominated by emotion and prejudices. There is very little empirical evidence about…

Standardized achievement tests are often misused as indicators of a school's quality or effectiveness relative to other schools. This is an incorrect use because it ignores variation among schools in student abilities, family support of education, student mobility, and other factors. People also misuse tests because they impute to them more…