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ERIC Number: ED243899
Record Type: RIE
Publication Date: 1983-Apr
Reference Count: 0
The Rasch Model as a Criterion: Applying the Rasch Model to the Analysis of Test Heterogeneity.
The aim of this paper is to explore the Rasch model as a criterion of test homogeneity. Two empirical studies are presented to demonstrate this usage. From these studies it is argued that statistical tests of item characteristic curve (ICC) slopes are not sufficient in testing for heterogeneity. Tests of equality of ICC's over groups of subject and, above all, tests of equality of person characteristic curve's over groups of items are the proper tests to use. It is also stressed that the application of these kinds of test puts high demands on a theoretical foundation. Finally, it is maintained that the problem of test heterogeneity is essentially a theoretical question. (Author)
Publication Type: Speeches/Meeting Papers; Reports - Research
Education Level: N/A
Sponsor: National Swedish Board of Education, Stockholm.
Authoring Institution: N/A
Identifiers: Item Parameters; Person Parameters; Rasch Model; Test Homogeneity; Unidimensionality (Tests)
Note: Paper presented at the Annual Meeting of the American Educational Research Association (67th, Montreal, Quebec, April 11-15, 1983).