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Direct linkCho, Hyun-Jeong; Lee, Jaehoon; Kingston, Neal – Applied Measurement in Education, 2012
This study examined the validity of test accommodation in third-eighth graders using differential item functioning (DIF) and mixture IRT models. Two data sets were used for these analyses. With the first data set (N = 51,591) we examined whether item type (i.e., story, explanation, straightforward) or item features were associated with item…
Descriptors: Testing Accommodations, Test Bias, Item Response Theory, Validity
Download full textSykes, Robert C.; Fitzpatrick, Anne R. – 1990
The results of classifying test items on the basis of their Mantel-Haenszel (MH) alpha estimates were compared to the results of classifying these items using an item response theory (IRT) based procedure involving the comparison of item difficulties in the interest of identifying the alpha value that maximized the decision concordance between the…
Descriptors: Classification, Cutting Scores, Difficulty Level, Ethnic Groups
Kino, Mary M.; And Others – 1995
Item response theory (IRT) has been used extensively to study differential item functioning (dif) and to identify potentially biased items. The use of IRT for diagnostic purposes is less prevalent and has received comparatively less attention. This study addressed differential objective function (dof) to identify potentially biased content units.…
Descriptors: Ability, Analysis of Variance, Demography, Difficulty Level
Parshall, Cynthia G.; And Others – 1994
Response latency information has been used in the past to provide information for consideration along with response accuracy when obtaining trait level estimates, and more recently, to flag unusual response patterns, to establish appropriate time-to-test limits (Reese, 1993), and to determine predictors of the amount of time needed to administer a…
Descriptors: Ability, Adaptive Testing, Age Differences, Classification
Kulick, Edward; Hu, P. Gillian – 1989
The relationship of differential item functioning (DIF) to item difficulty on the Scholastic Aptitude Test (SAT) was examined, based on data from nine recent administrations of the test from June 1986 through December 1987. This pool of information includes item statistics on 765 verbal and 540 mathematical items computed for subgroups of White,…
Descriptors: Asian Americans, Black Students, College Bound Students, College Entrance Examinations
