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Saatçioglu, Fatima Münevver; Atar, Hakan Yavuz – Participatory Educational Research, 2020
This study examined the existence of latent classes in TIMSS 2015 data from three countries, Singapure, Turkey and South Africa, were analyzed using Mixture Item Response Theory (MixIRT) models (Rasch, 1PL, 2PL and 3PL) on 18 multiple-choice items in the science subtest. Based on the findings, it was concluded that the data obtained from TIMSS…
Descriptors: Foreign Countries, Item Response Theory, Achievement Tests, International Assessment