A misconception exists that validity may refer only to the "interpretation" of test scores and not to the "uses" of those scores. The development and evolution of validity theory illustrate test score interpretation was a primary focus in the earliest days of modern testing, and that validating interpretations derived from test…

Four influential studies on school effectiveness reported by Brookover and Lezotte (1979), Edmonds and Frederiksen (1979), Phi Delta Kappa (1980), and Rutter and others (1979) are limited in their usefulness as recipes for creating effective schools by the following four issues: (1) The four studies differ in their definition of what…