International Education Journal

Articles from the Educational Research Conference 2001

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Misfits: People and their problems. What might it all mean?


David D Curtis
david.curtis@flinders.edu.au
Flinders University, Centre for Lifelong Learning and Development and School of Education

  

 

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Abstract

In the analysis of data, which arise from the administration of multiple choice tests or survey instruments and which are assumed to conform to a measurement model such as Rasch, it is normal practice to check item fit statistics in order to ensure that the items used in the instrument cohere to form a unidimensional trait measure. However, checking whether individuals also fit the measurement model appears to be less common. It is shown that poor person-fit compromises item parameter estimates and so it is argued that person-fit should be checked routinely in the calibration of instruments and in scoring individuals. Unfortunately, the meanings that can be ascribed to person-fit statistics for attitude instruments is not clear. A proposal for seeking the required clarity is developed.

Item Response Theory, Rasch, person-fit statistics, attitude

 

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Curtis, D.D. (2001)  Misfits: People and their problems. What might it all mean?. International Education Journal, 2 (4), 91-99.
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