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Download full textQian, Jiahe – ETS Research Report Series, 2018
The 2-parameter logistic multidimensional item response theory (MIRT) model was employed to model growth for the National Education Longitudinal Study of 1988 (NELS:88). The 3 measurement waves of NELS:88 (base year, first follow-up, and second follow-up) represented 3 dimensions.The inquiry aimed to improve modeling performance growth based on…
Descriptors: Growth Models, Longitudinal Studies, Item Response Theory, National Surveys
Wei, Youhua; Morgan, Rick – ETS Research Report Series, 2016
As an alternative to common-item equating when common items do not function as expected, the single-group growth model (SGGM) scaling uses common examinees or repeaters to link test scores on different forms. The SGGM scaling assumes that, for repeaters taking adjacent administrations, the conditional distribution of scale scores in later…
Descriptors: Equated Scores, Growth Models, Scaling, Computation
