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Russell T. Warne – Gifted and Talented International, 2023
Tests of measurement invariance are essential to determining whether individual scores or group averages are comparable across populations. While international comparisons of mean IQ scores are common, tests of measurement invariance for intelligence test batteries (necessary for comparisons to be empirically supported) are rare. In this study,…
Descriptors: Foreign Countries, Adults, Intelligence Tests, Children
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Lifshit, Hefziba Batya; Bustan, Noa; Shnitzer-Meirovich, Shlomit – Journal of Applied Research in Intellectual Disabilities, 2021
Goals: This study examined: (a) crystallized/fluid intelligence trajectories of adolescents and adults with Down syndrome; and (b) the contribution of endogenous (health, activities of daily living--ADL) and exogenous (cognitively stimulating leisure activities) factors on adults' intelligence with age. Method: Four cohorts (N = 80) with Down…
Descriptors: Down Syndrome, Adolescents, Adults, Health Behavior