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Can There Be Reliability Without "Reliability?".
EDUCATIONAL TESTING SERVICE PRINCETON NJ
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A recent article by Pamela Moss asks the title question, Can there be validity without reliability If by reliability we mean only KR-2O coefficients or inter-rater correlations, the answer is yes. Sometimes these particular indices for evaluating evidence suit the problem we encounter sometimes they dont. If by reliability we mean credibility of evidence, wehre credibility is defined as appropriate to the intended inference, the answer is no, we cannot have validity without reliability. Because validity encompasses the process of reasoning as well as the data, uncritically accepting observations as strong evidence, when they may be incorrect, misleading, unrepresentative, or fraudulent, may lead coincidentally to correct conclusions but not to valid ones. This paper discusses and illustrates a broader conception of reliability in educational assessment, to ground a deeper understanding of the issues raised by Professor Mosss question.
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