ERIC Number: EJ758129
Record Type: Journal
Publication Date: 2007
Reference Count: N/A
Modern Psychometric Methodology: Applications of Item Response Theory
Reid, Christine A.; Kolakowsky-Hayner, Stephanie A.; Lewis, Allen N.; Armstrong, Amy J.
Rehabilitation Counseling Bulletin, v50 n3 p177-188 Spr 2007
Item response theory (IRT) methodology is introduced as a tool for improving assessment instruments used with people who have disabilities. Need for this approach in rehabilitation is emphasized; differences between IRT and classical test theory are clarified. Concepts essential to understanding IRT are defined, necessary data assumptions are identified, and specific data analysis techniques, using software such as TESTFACT and BILOG, are described. An example of IRT analysis applied to a subtest of the "General Aptitude Test Battery" (GATB) administered to people who have diverse disabilities is provided. Future potential uses of this approach in rehabilitation are outlined.
Descriptors: Psychometrics, Methods, Item Response Theory, Aptitude Tests, Test Items, Evaluation Research, Disabilities, Rehabilitation, Test Theory, Data Analysis, Research Methodology, Computer Software
PRO-ED, Inc. 8700 Shoal Creek Boulevard, Austin, TX 78757-6897. Tel: 800-897-3202; Fax: 800-397-7633; Web site: http://www.proedinc.com
Publication Type: Journal Articles; Reports - General
Education Level: N/A
Authoring Institution: N/A
Identifiers - Assessments and Surveys: General Aptitude Test Battery