In "How Is Testing Supposed to Improve Schooling?" Edward Haertel has proposed a framework for thinking about the mechanisms by which testing might improve the various educational processes undertaken in schools. The framework seems to the author to be quite general (he uses the word "general" here in its mathematical sense of including all cases)…

The 1999 "Standards for Educational and Psychological Testing" defines validity as the degree to which evidence and theory support the interpretations of test scores entailed by proposed uses of tests. Although quite explicit, there are ways in which this definition lacks precision, consistency, and clarity. The history of validity has taught us…