| Abstract: | Item options of shortened forms of the GRE Verbal and Quantitative tests were empirically weighted by two variants of a method originally attributed to Guttman (1941). When compared with formula scores, it was found that tests scored with the empirical weights were more reliable but less valid when correlated with undergraduate GPA. A factor analysis revealed large increases in variance accounted for by the first factor. It was suggested that the weighting procedures used tended to capitalize on omitting behavior which, although a highly reliable tendency, may be invalid. |
