ERIC Number: ED308239
Record Type: Non-Journal
Publication Date: 1988-Nov
Reference Count: N/A
Loglinear-Latent-Class Models for Detecting Item Bias. Project Psychometric Aspects of Item Banking No. 36. Research Report 88-10.
Kelderman, Henk; Macready, George B.
The use of loglinear latent class models to detect item bias was studied. Purposes of the study were to: (1) develop procedures for use in assessing item bias when the grouping variable with respect to which bias occurs is not observed; (2) develop bias detection procedures that relate to a conceptually different assessed trait--a categorical attribute; and (3) exemplify the use of these developed procedures with real world data. Models are formulated so that the attribute to be measured may be continuous, as in a Rasch model, or categorical, as in latent class models. The item bias to be studied may correspond to a manifest grouping variable, a latent grouping variable, or both. Likelihood-ratio tests for assessing the presence of various types of bias are described. These methods are illustrated through analysis of a "real world" data set from a study of multiplication items administered to 286 Dutch undergraduates. Bias was related to a manifest grouping variable by giving 143 of the subjects some training in Roman numerals, in which some of the multiplication problems were written. Results indicate that it was possible to explain item bias through differences in item difficulties or error rates across levels of grouping variables. The model represented can be extended to include several observed and unobserved variables. Ten tables present information about the models and findings of the study. A 39-item list of references is included. (SLD)
Descriptors: Foreign Countries, Higher Education, Latent Trait Theory, Mathematical Models, Multiplication, Statistical Analysis, Statistical Bias, Test Bias, Test Items, Testing Problems, Undergraduate Students
Bibliotheek, Department of Education, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
Publication Type: Reports - Evaluative; Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: Twente Univ., Enschede (Netherlands). Dept. of Education.
Identifiers - Location: Netherlands