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Peer reviewedLord, Frederic M. – Psychometrika, 1975
For the six available sets of empirical data, the discrimination (slope) parameter of the logistic item characteristic curve was found to have a significant positive correlation over items with the difficulty (location) parameter. This unpleasant situation can be eliminated by a suitably chosen transformation of the ability scale. (Author/RC)
Descriptors: Ability, Aptitude Tests, Correlation, Item Analysis
Download full textMorse, David T.; Morse, Linda W. – 1976
Performance testing often entails the usage of expensive, time-consuming measures in the quest for determining the level of performance on some desired behavior. It is concluded that a generalizability theory approach to dealing with departures from reality in testing can aid in the establishment of empirically-based choices of measurement…
Descriptors: Cost Effectiveness, Decision Making, Mathematical Models, Measurement Techniques
Graham, Darol L.; Bergquist, Constance – 1975
Two models were identified for criterion-referenced tests, one based on the assumption of a continuous achievement variable and the other assuming a dichotomous or binary variable. Several test characteristics were examined and contrasted for the two models, including the distribution of scores, establishment of a cutting score, test length, item…
Descriptors: Academic Achievement, Achievement Tests, Criterion Referenced Tests, Cutting Scores
