Empirically weighted scores for Rest's Defining Issues Test were found to be more reliable than the simple sum of scores theoretically weighted sum, or Rest's p scores. They also had slightly higher correlations with Kohlberg's interview scores. Empirically weighted scores also showed more significant change in two longitudinal studies. (CTM)

The purpose of this study was to determine whether option weighting improved the internal consistency and intercorrelation of the subtests. The differential option-weighting scheme employed in this study is based on one devised by Guttman. The tests were first scored with Guttman-type weights and then with conventional correction-for-guessing…