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Peer reviewedSlinde, Jeffrey A.; Linn, Robert L. – Journal of Educational Measurement, 1979
The Rasch model was used to equate reading comprehension tests of widely different difficulty for three groups of fifth grade students of widely different ability. Under these extreme circumstances, the Rasch model equating was unsatisfactory. (Author/CTM)
Descriptors: Academic Ability, Bias, Difficulty Level, Equated Scores
Peer reviewedCamilli, Gregory – Applied Psychological Measurement, 1992
A mathematical model is proposed to describe how group differences in distributions of abilities, which are distinct from the target ability, influence the probability of a correct item response. In the multidimensional approach, differential item functioning is considered a function of the educational histories of the examinees. (SLD)
Descriptors: Ability, Comparative Analysis, Equations (Mathematics), Factor Analysis
Smith, Richard M.; Mitchell, Virginia P. – 1979
To improve the accuracy of college placement, Rasch scoring and person-fit statistics on the Comparative Guidance and Placement test (CGP) was compared to the traditional right-only scoring. Correlations were calculated between English and mathematics course grades and scores of 1,448 entering freshmen on the reading, writing, and mathematics…
Descriptors: Academic Ability, Computer Programs, Difficulty Level, Goodness of Fit
Download full textMuthen, Bengt O.; And Others – 1988
Item response theoretic methods are applied to the measurement of achievement of students from various instructional backgrounds. This extended item response theory (IRT) approach serves as a tool for studying instructional bias, or instructional sensitivity. The model maintains the form of an IRT model, but has parameters that quantify the extent…
Descriptors: Achievement Tests, Educational Background, Elementary Secondary Education, Grade 8
