The standard approach to test validity requires a realist or externalist philosophical perspective. An idealist or internalist perspective results in a radically different interpretation of validity. If reality is mind-constructed and truth is agreement, then instruments cannot stand separate from what they purport to measure. (MT)

Measurement of change is essential for documenting the effects of social programs, for refining social-educational programs, and for guiding policy decisions about resource allocation. (CJ)

In a discussion of accountability and performance contracting, the author believes that within a couple of years, performance contracting in its present form will be seen as a rather primitive, simplistic approach to the practice of accountability, but the notion of accountability will continue to be a powerful influence on the educational scene.…