Weber (1977) contends that the use of Rasch analysis, principal components analysis, and classical test analysis shows that an in strument designed to measure a "bilevel dimensionality" in proba bility achievement (Levin, 1975) in fact measures a single latent trait. This article questions that interpretation and the use of Rasch and classical analysis to establish unidimensionality.
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References
1.
Green, S.B., Lissitz, R.W., and Mulaik, S.A.Limitations of coefficient alpha as an index of test unidimensionality . EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, 1977, 37, 827-837.
2.
Levin, T.The effect of content pre-requisite and process-oriented experiences on application ability in the learning probability. Unpublished Ph.D. dissertation, University of Chicago, 1975.
3.
Weber, M.B.An examination of the bilevel dimensionality of lower and higher mental processes in probability achievement. EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, 1977, 37, 987-990.
