An item response theory application to shorten and validate the STEM interest complexity measure

2016-04-12
Toker, Yonca
Gültaş, Mehmet
The purpose of the present study was to shorten the 122-item STEM Interest Complexity Measure which is a valid measure of interests towards increasingly complex tasks covering the domains of numeric, symbolic, spatial, and STEM-ideas within the Science, Technology, Engineering, and Mathematics (STEM) areas. In a sample of 418 undergraduates enrolled in STEM majors, polytomous IRT using the Graded Response Model was applied. Items that best discriminated across interest trait levels were retained. The 43-item shortened version of the measure offered equivalent validity estimates with vocational criteria of STEM-GPA, STEM-major satisfaction, and intentions to pursue increasingly complex STEM occupations. The study contributes to IRT applications in scale refinement and to producing a practical tool in vocational interest assessments.
Citation Formats
Y. Toker and M. Gültaş, “An item response theory application to shorten and validate the STEM interest complexity measure,” presented at the Annual Meeting of the American Educational Research Association, 8 - 12 April 2016, Washington D.C., United States Of America, 2016, Accessed: 00, 2021. [Online]. Available: http://www.aera.net/Publications/Online-Paper-Repository/AERA-Online-Paper-Repository.