All About Assessment: The Mistaken Holy Grail - 0 views
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Anne Bubnic on 04 Sep 08Assessment validity refers to the accuracy of a score-based inference about a test taker's status. This definition sounds pretty highbrow, but it really isn't. Educators are interested in getting a fix on students' knowledge and skills so they can make sensible instructional decisions about those students. But teachers can't tell how much a particular student knows merely by looking at the student. That's because students' cognitive skills and knowledge are covert. Accordingly, we test students so we can use their overt responses to the test to make an inference about what's covert. Tests aren't valid or invalid; inferences are.