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ERIC Number: EJ919902
Record Type: Journal
Publication Date: 2011
Pages: 5
Abstractor: As Provided
Reference Count: 29
ISSN: ISSN-1303-0485
Sample Size in Differential Item Functioning: An Application of Hierarchical Linear Modeling
Acar, Tulin
Educational Sciences: Theory and Practice, v11 n1 p284-288 Win 2011
The purpose of this study is to examine the number of DIF items detected by HGLM at different sample sizes. Eight different sized data files have been composed. The population of the study is 798307 students who had taken the 2006 OKS Examination. 10727 students of 798307 are chosen by random sampling method as the sample of the study. Turkish, science, and social studies subtests, all composed of 25 items and applied in the OKS-2006, are used as data gathering instruments in this study. It has been concluded that varieties in sample sizes have a great effect on DIF detection in test items. (Contains 2 tables.)
Educational Consultancy, Ltd (EDAM). Kisikli Mh. Alemdag Cd. Yan Yol Sk., SBK Is Merkezi No:5 Kat:1, Uskudar-Istanbul, 34692 Turkey. Tel: +90-216-481-30-23; Fax: +90-216-481-31-36; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Turkey