PERC 2011 Abstract Detail Page
|Abstract Title:||Explicating the latent construct of Brief Electricity and Magnetism Assessment|
|Abstract:||This paper attempts to use Rasch theory to explicate the latent construct of BEMA the Brief Electricity & Magnetism Assessment. BEMA is a 30-item multiple-choice test, designed to measure student understanding of basic electricity and magnetism (E&M) concepts at the introductory physics level. Differing from many concept inventories, such as the FCI, BEMA covers a broad range of topics in the E&M domain. A great deal of prior research has been conducted to evaluate its validity and reliability, and implement it to gauge students performance. However, all these efforts relied on students raw data entry with the Classical Test Theory (CTT) for analysis. In the present study we applied the Rasch model to investigate the extent to which the BEMA items can measure a single underlying construct, students understanding of E&M. In addition, we sought to explore multiple latent constructs for comparison with the single-construct case.|
|Abstract Type:||Contributed Poster
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