ERIC Number: ED390928
Record Type: RIE
Publication Date: 1995-Apr
Reference Count: N/A
Methodological Considerations in Using DIMTEST To Assess Unidimensionality.
Blais, Jean-Guy; Laurier, Michel
This study deals with the assessment of the unidimensionality of a set of items through the procedure developed by W. Stout and others (1991) and implemented in the computer program DIMTEST. This study examines a special feature of DIMTEST: the possibility for the user to assess the unidimensionality of a set of items by specifying a subset believed to form a homogeneous group of items. Data came from 3 subtests of an experimental version of a placement test in French as a second language, with samples of 698, 654, and 694 examinees. Results demonstrated the presence of essentially one dimension for the first subtest and of more than one dimension for the third subtest. These results also illustrate the applicability of the DIMTEST approach for studying dimensionality. The study further stresses the importance of considering unidimensionality as a multifaceted concept. An appendix describes the DIMTEST procedure in detail. (Contains 3 tables and 36 references.) (SLD)
Publication Type: Reports - Evaluative; Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: N/A
Identifiers: Dimensionality (Tests); DIMTEST (Computer Program); Unidimensionality (Tests)
Note: Paper presented at the Annual Meeting of the American Educational Research Association (San Francisco, CA, April 18-22, 1995).