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Evaluation studies are conducted in order to arrive at defensible conclusions concerning important questions, questions which take many forms. It is now generally recognized that the term educational evaluation is used, quite legitimately, to refer to a broad range of activities associated in some general way with the assessment of the worth of some aspect of educational programs and activities. For example, Worthen and Sanders (1973) state that:
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Lindvall et al. (1981) studied this question.
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