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Abstract Title: Multidimensional Item Response Theory and the Force and Motion Conceptual Evaluation
Abstract: Using data from 4528 student responses to the Force and Motion
Conceptual Evaluation (FMCE), we applied  Multidimensional Item
Response Theory (MIRT) Exploratory factor analysis, and identified
a 10-factor model. However, much of the optimal factor structure
was related to the blocking of items into a group with a common
stem. A confirmatory analysis, which constrained the MIRT models
to a theoretical model constructed from expert solutions, produced
a model requiring only 8 principles, fundamental reasoning steps.
This was substantially fewer than that identified in the Force
Concept Inventory FCI. Correlation analysis also demonstrated that
the two instruments were very dissimilar. The reduced number of
principles allowed the extraction of eight single-principle
subscales, seven with Cronbach's alpha greater than the 0.7
required for acceptable internal consistency.
Abstract Type: Contributed Poster Presentation
Session Time: Poster Session I
Poster Number: A54

Author/Organizer Information

Primary Contact: Jie Yang
West Virginia University
and Co-Presenter(s)
John Stewart