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Direct linkCristan Farmer; Audrey Thurm; Tanvi Das; E. Martina Bebin; Jonathan A. Bernstein; Elizabeth Berry-Kravis; Joseph D. Buxbaum; Charis Eng; Thomas Frazier; Antonio Y. Hardan; Alexander Kolevzon; Darcy A. Krueger; Julian A. Martinez-Agosto; Hope Northrup; Craig M. Powell; Latha Valluripalli Soorya; Joyce Y. Wu; Mustafa Sahin – American Journal on Intellectual and Developmental Disabilities, 2025
Developmental domains, such as cognitive, language, and motor, are key concepts of interest in longitudinal studies of intellectual and developmental disabilities (IDD). Normative scores (e.g., IQ) are often used to operationalize performance on standardized tests of these concepts, but it is the interval-distributed person-ability scores that are…
Descriptors: Cognitive Tests, Intelligence Tests, Cognitive Ability, Intellectual Disability
Womack, Sean R.; Beam, Christopher R.; Davis, Deborah Winders; Finkel, Deborah; Turkheimer, Eric – Developmental Psychology, 2022
Twins regularly score nearly a standard deviation below the population mean on standardized measures of cognitive development in infancy but recover to the population mean by early childhood, making rapid gains through the toddler years. To date, only polynomial growth models have been fit to model cognitive recovery across childhood, limiting the…
Descriptors: Twins, Cognitive Ability, Genetics, Environmental Influences
Simonton, Dean Keith – Gifted Child Quarterly, 2020
With just one exception, all of the volumes in Terman's Genetic Studies of Genius report the results of a longitudinal study of more than a thousand intellectually gifted children. That single exception is Volume II, Cox's single-authored "The Early Mental Traits of Three Hundred Geniuses," which instead was a retrospective study of 301…
Descriptors: Gifted, Individual Characteristics, Intelligence Quotient, History
Zajda, Joseph – Curriculum and Teaching, 2019
This article analyses research of theories and models of intelligence. It examines current developments in intelligence research, covering the formation of more complex and diverse intelligence theories. First, the article examines some of the widely used aptitude/intelligence tests include, such Stanford-Binet Intelligence Quotient, Wechsler…
Descriptors: Intelligence, Learning Theories, Intelligence Tests, Cognitive Ability
Wolfenden, C.; Wittkowski, A.; Hare, D. J. – Journal of Autism and Developmental Disorders, 2017
The prevalence of autism spectrum disorder (ASD) in many genetic disorders is well documented but not as yet in Mucopolysaccharidosis type III (MPS III). MPS III is a recessively inherited metabolic disorder and evidence suggests that symptoms of ASD present in MPS III. This systematic review examined the extant literature on the symptoms of ASD…
Descriptors: Autism, Pervasive Developmental Disorders, Genetic Disorders, Symptoms (Individual Disorders)
