Why the Item '23 +1' Is Not in a Depression Questionnaire: Validity From a Network Perspective

摘要

What is validity? A simple question but apparently one with many answers, as Newton (this issue) highlights in his review of the history of validity. The current definition of validity, as entertained in the 1999 Standards for Educational and Psychological Testing is indeed a consensus, one between the classical notion of attributes, and measures thereof, and Cronbach & Meehl's (1955) proposition that validity should be concerned with interpretations of test scores and not with the tests themselves. Newton is certainly right when striving for a clearer and more precise definition of validity than the Standards' definition; and in many ways Newton succeeds in achieving this goal.