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LeBeau, Brandon; Assouline, Susan G.; Mahatmya, Duhita; Lupkowski-Shoplik, Ann – Gifted Child Quarterly, 2020
This study investigated the application of item response theory (IRT) to expand the range of ability estimates for gifted (hereinafter referred to as high-achieving) students' performance on an above-level test. Using a sample of fourth- to sixth-grade high-achieving students (N = 1,893), we conducted a study to compare estimates from two…
Descriptors: Item Response Theory, Test Theory, Academically Gifted, High Achievement
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Ilhan, Mustafa; Guler, Nese – Eurasian Journal of Educational Research, 2018
Purpose: This study aimed to compare difficulty indices calculated for open-ended items in accordance with the classical test theory (CTT) and the Many-Facet Rasch Model (MFRM). Although theoretical differences between CTT and MFRM occupy much space in the literature, the number of studies empirically comparing the two theories is quite limited.…
Descriptors: Difficulty Level, Test Items, Test Theory, Item Response Theory