The traditional concept of validity divides it into three separate types; content, criterion, and construct validities. This view is fragmented and incomplete, failing to take into account evidence of the value implications of score meaning as a basis for action and of the social consequences of score use. The new unified concept of validity…

The concept of "washback," especially prominent in the field of applied linguistics, refers to the extent to which a test influences teachers and learners to do things they would not otherwise necessarily do. Some writers invoke the notion of washback validity, holding that a test's validity should be gauged by the degree to which it has…