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ERIC Number: EJ900335
Record Type: Journal
Publication Date: 2010
Pages: 6
Abstractor: As Provided
Reference Count: 0
ISSN: ISSN-0891-4222
Executive Functions in Individuals with Intellectual Disability
Danielsson, Henrik; Henry, Lucy; Ronnberg, Jerker; Nilsson, Lars-Goran
Research in Developmental Disabilities: A Multidisciplinary Journal, v31 n6 p1299-1304 Nov-Dec 2010
The aim of the present study was to investigate executive functions in adults with intellectual disability, and compare them to a closely matched control group longitudinally for 5 years. In the Betula database, a group of adults with intellectual disability (ID, n = 46) was defined from measures of verbal and non-verbal IQ. A control group, with two people for every person with intellectual disability (n = 92), was chosen by matching on the following criterion in order of priority: IQ higher than 85, age, sex, sample, level of education, and years of education. Three types of tasks of executive functions were included on two occasions, with 5 years between testing sessions: The Tower of Hanoi, executively loaded dual task versions of word recall, and verbal fluency. Adults with ID showed significant impairments on verbal fluency and on the executively loaded dual task word recall task (at encoding but not at recall). There were no group differences on the Tower of Hanoi. No significant differences between the two test occasions were found. The results are interpreted in terms of individuals with ID having problems with speed of accessing lexical items and difficulties with working memory-related executive control at encoding, which includes shifting between tasks. There are, however, not necessarily problems with inhibition. The dual task results additionally imply that the adults with intellectual disability were more sensitive to strategy interruptions at encoding, but that dividing attention at recall did not have such detrimental effects. (Contains 3 tables.)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A