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Frary, Robert B.; And Others – Journal of Experimental Education, 1977
To date a theoretical basis has not been developed for determining changes in reliability when score points from random guessing are eliminated and those from non-randon guessing are retained. This paper presents a derivation of an expression for the reliability coefficient which displays the effect of deleting score components due to random…
Descriptors: Data Analysis, Guessing (Tests), Multiple Choice Tests, Scoring Formulas