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Brain Reserve Theory: Are Adults with Intellectual Disability More Vulnerable to Age than Peers with Typical Development?
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Zemach, Moran; Vakil, Eli; Lifshitz, Hefziba – Journal of Applied Research in Intellectual Disabilities, 2023
Background: Life expectancy is on rise and the intriguing question is: When does cognitive decline occur among adults with intellectual disability, compared to adults with typical development? This cross-sectional study examined cognitive performance of crystallised/fluid intelligence, working and long-term memory of adults with intellectual…
Descriptors: Adults, Intellectual Disability, Intelligence Tests, Verbal Learning
50 Years with Down Syndrome: A Longitudinal Study
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Carr, Janet; Collins, Suzanne – Journal of Applied Research in Intellectual Disabilities, 2018
Background: A population sample of people with Down syndrome, studied from infancy, has now been followed up at the age of 50 years. From the original sample of 54, there were 27 still in the study at the age of 50, all but four of the losses resulting from deaths. Methods: Intelligence and language skills were tested and daily living skills…
Descriptors: Down Syndrome, Longitudinal Studies, Dementia, Aging (Individuals)
Intelligence Is in the Eye of the Beholder: Investigating Repeated IQ Measurements in Forensic Psychiatry
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Habets, Petra; Jeandarme, Inge; Uzieblo, Kasia; Oei, Karel; Bogaerts, Stefan – Journal of Applied Research in Intellectual Disabilities, 2015
Background: A stable assessment of cognition is of paramount importance for forensic psychiatric patients (FPP). The purpose of this study was to compare repeated measures of IQ scores in FPPs with and without intellectual disability. Methods: Repeated measurements of IQ scores in FPPs (n = 176) were collected. Differences between tests were…
Descriptors: Mental Retardation, Cognitive Ability, Intelligence, Intelligence Tests
Six Weeks to 45-Years: A Longitudinal Study of a Population with Down Syndrome
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Carr, Janet – Journal of Applied Research in Intellectual Disabilities, 2012
Background: A population sample of people with Down Syndrome, repeatedly studied since infancy, has now been followed up at the age of 45 years. The paper is intended to give an overview of their abilities, as represented by the results of psychological tests, over their life span to date. Methods: As at all previous occasions from age 30 onwards,…
Descriptors: Dementia, Down Syndrome, Memory, Academic Ability
Comparison of the WAIS-III and WISC-IV in 16-Year-Old Special Education Students
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Gordon, Shirley; Duff, Simon; Davidson, Terry; Whitaker, Simon – Journal of Applied Research in Intellectual Disabilities, 2010
Background: Previous research with earlier versions of the WISC and WAIS has demonstrated that when administered to people who have intellectual disabilities, the WAIS produced higher IQ scores than the WISC. The aim of this study was to examine whether these differences still exist. A comparison of the Wechsler Adult Intelligence Scale-Third…
Descriptors: Intelligence, Mental Retardation, Psychologists, Intelligence Quotient
A Comparison of WAIS-R and WAIS-III in the Lower IQ Range: Implications for Learning Disability Diagnosis
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Fitzgerald, Suzanne; Gray, Nicola S.; Snowden, Robert J. – Journal of Applied Research in Intellectual Disabilities, 2007
Background: Whether the Flynn effect (the increase in the populations' IQ over time) affects the IQ scores of people with learning disability or borderline learning disability remains unclear. The issue is important as the Flynn effect should alter the number of people eligible for health service resources. A comparison of the Wechsler Adult…
Descriptors: Health Services, Intelligence Tests, Learning Disabilities, Intelligence Quotient