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Custer, Michael; Sharairi, Sid; Yamazaki, Kenji; Signatur, Diane; Swift, David; Frey, Sharon – Online Submission, 2008
The present study compared item and ability invariance as well as model-data fit between the one-parameter (1PL) and three-parameter (3PL) Item Response Theory (IRT) models utilizing real data across five grades; second through sixth as well as simulated data at second, fourth and sixth grade. At each grade, the 1PL and 3PL IRT models were run…
Descriptors: Error of Measurement, Item Response Theory, Models, Goodness of Fit
Sarouphim, Ketty M. – Online Submission, 2008
The purpose of this study was to investigate the effectiveness of DISCOVER, a performance-based assessment in identifying gifted Lebanese students. The sample consisted of 248 students (121 boys, 127 girls) from grades 3-5 at two private schools in Beirut, Lebanon. Results showed evidence for DISCOVER's concurrent validity with the Raven Standard…
Descriptors: Private Schools, Performance Based Assessment, Identification, Gifted
Yen, Shu Jing; Ochieng, Charles; Michaels, Hillary; Friedman, Greg – Online Submission, 2005
The main purpose of this study was to illustrate a polytomous IRT-based linking procedure that adjusts for rater variations. Test scores from two administrations of a statewide reading assessment were used. An anchor set of Year 1 students' constructed responses were rescored by Year 2 raters. To adjust for year-to-year rater variation in IRT…
Descriptors: Test Items, Measures (Individuals), Grade 8, Item Response Theory
Stoneberg, Bert D., Jr. – Online Submission, 2004
The purpose of this study was to screen for gender-based (female-male) and ethnic-based (Hispanic-White) differential item functioning (DIF) in the 2003 Idaho Standards Achievement Tests of reading, language arts and mathematics at grades 4, 8 and 10. The vendor, the Northwest Evaluation Association (NWEA), assembled the computer-administered…
Descriptors: State Standards, Grade 8, Grade 10, Grade 4
Yen, Shu Jing; Ochieng, Charles; Michaels, Hillary; Friedman, Greg – Online Submission, 2005
Year-to-year rater variation may result in constructed response (CR) parameter changes, making CR items inappropriate to use in anchor sets for linking or equating. This study demonstrates how rater severity affected the writing and reading scores. Rater adjustments were made to statewide results using an item response theory (IRT) methodology…
Descriptors: Test Items, Writing Tests, Reading Tests, Measures (Individuals)
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Carmo, Mafalda, Ed. – Online Submission, 2017
This book contains a compilation of papers presented at the International Conference on Education and New Developments (END 2017), organized by the World Institute for Advanced Research and Science (W.I.A.R.S.). Education, in our contemporary world, is a right since we are born. Every experience has a formative effect on the constitution of the…
Descriptors: Educational Quality, Models, Vocational Education, Outcomes of Education