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Allen, Jeff; Mattern, Krista – Educational Measurement: Issues and Practice, 2019
We examined summary indices of high school performance (coursework, grades, and test scores) based on the graded response model (GRM). The indices varied by inclusion of ACT test scores and whether high school courses were constrained to have the same difficulty and discrimination across groups of schools. The indices were examined with respect to…
Descriptors: High School Students, Academic Achievement, Secondary School Curriculum, Difficulty Level
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Qian, Xiaoyu; Nandakumar, Ratna; Glutting, Joseoph; Ford, Danielle; Fifield, Steve – ETS Research Report Series, 2017
In this study, we investigated gender and minority achievement gaps on 8th-grade science items employing a multilevel item response methodology. Both gaps were wider on physics and earth science items than on biology and chemistry items. Larger gender gaps were found on items with specific topics favoring male students than other items, for…
Descriptors: Item Analysis, Gender Differences, Achievement Gap, Grade 8
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Scherbaum, Charles A.; Goldstein, Harold W. – Educational and Psychological Measurement, 2008
Recent research examining racial differences on standardized cognitive tests has focused on the impact of test item difficulty. Studies using data from the SAT and GRE have reported a correlation between item difficulty and differential item functioning (DIF) such that minority test takers are less likely than majority test takers to respond…
Descriptors: Race, Test Items, Standardized Tests, Cognitive Tests
Kelkar, Vinaya; Wightman, Linda F.; Luecht, Richard M. – 2000
The purpose of this study was to investigate the viability of the property of parameter invariance for the one-parameter (1P), two-parameter (2P), and three-parameter (3P) item response theory (IRT) models for the Medical College Admissions Tests (MCAT). Invariance of item parameters across different gender, ethnic, and language groups and the…
Descriptors: Ability, College Entrance Examinations, Difficulty Level, Ethnicity
Pike, Gary – 1989
Responses to American College Test College Outcome Measures Program (ACT-COMP) items by 481 black and 9,237 white students at the University of Tennessee (Knoxville) were analyzed using F. Samejima's graded model to determine the level of differential item functioning (DIF). Students had been tested using Form 8 of the ACT-COMP objective test…
Descriptors: Black Students, College Entrance Examinations, College Students, Comparative Testing