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Sideridis, Georgios D. – Educational and Psychological Measurement, 2016
The purpose of the present studies was to test the hypothesis that the psychometric characteristics of ability scales may be significantly distorted if one accounts for emotional factors during test taking. Specifically, the present studies evaluate the effects of anxiety and motivation on the item difficulties of the Rasch model. In Study 1, the…
Descriptors: Learning Disabilities, Test Validity, Measures (Individuals), Hierarchical Linear Modeling
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Souroulla, Andry Vrachimi; Panayiotou, Georgia; Kokkinos, Constantinos M. – Journal of Learning Disabilities, 2009
The purpose of the study was to examine whether the Greek translation of the "Learning Disability Evaluation Scale" (LDES) can be used in the identification of learning disabilities. The LDES was completed by 165 teachers for one of their students, aged 5 to 14 years. The LDES was significantly correlated to students' grades in Math and…
Descriptors: Learning Disabilities, Factor Analysis, Measures (Individuals), Disability Identification