NotesFAQContact Us
Collection
Advanced
Search Tips
Back to results
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ1125361
Record Type: Journal
Publication Date: 2017-Jan
Pages: 22
Abstractor: As Provided
Reference Count: 47
ISBN: N/A
ISSN: ISSN-0013-1644
Psychometric Consequences of Subpopulation Item Parameter Drift
Huggins-Manley, Anne Corinne
Educational and Psychological Measurement, v77 n1 p143-164 Jan 2017
This study defines subpopulation item parameter drift (SIPD) as a change in item parameters over time that is dependent on subpopulations of examinees, and hypothesizes that the presence of SIPD in anchor items is associated with bias and/or lack of invariance in three psychometric outcomes. Results show that SIPD in anchor items is associated with a lack of invariance in dimensionality structure of an anchor test, a lack of invariance in scaling coefficients across subpopulations, and a lack of invariance in ability estimates. It is demonstrated that these effects go beyond what can be understood from item parameter drift or differential item functioning.
SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail: journals@sagepub.com; Web site: http://sagepub.com
Publication Type: Journal Articles; Reports - Research
Education Level: Grade 4; Intermediate Grades; Elementary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Florida
Identifiers - Assessments and Surveys: Florida Comprehensive Assessment Test