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Multiple Choice Test Bias Uncovered by Use of an "I Don't Know" Alternative.
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Sherman, Susan W. – 1976
The multiple-choice science exercises used by the National Assessment of Educational Progress include an "I Don't Know" (IDK) alternative to estimate more accurately knowledge of groups of respondents. Group percentages of IDK responses were examined and compared with correct responses to see if the IDK introduces bias. Variance common…
Descriptors: Age Differences, Comparative Analysis, Groups, Guessing (Tests)