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A Method for Studying the Homogeneity of Test Items with Respect to Other Relevant Variables

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  • Bengt Muthén

Abstract

Drawing on recently developed methodology for structural equation modeling with categorical data, this article proposes a new approach for investigating the behavior of a set of dichotomously scored test items in relation to a set of other relevant (observed) variables. This is achieved by considering a linear structural model relating the latent ability variable to a set of observed scores. The approach gives information on hypothesized unidimensionality and homogeneity of items with respect to these other variables. Some examples are given where a set of biology anchor items is related to a set of other related test scores obtained from the examinees.

Suggested Citation

  • Bengt Muthén, 1985. "A Method for Studying the Homogeneity of Test Items with Respect to Other Relevant Variables," Journal of Educational and Behavioral Statistics, , vol. 10(2), pages 121-132, June.
  • Handle: RePEc:sae:jedbes:v:10:y:1985:i:2:p:121-132
    DOI: 10.3102/10769986010002121
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