Journal article
Working memory - not processing speed - mediates fluid intelligence deficits associated with attention deficit/hyperactivity disorder symptoms
Journal of Neuropsychology, Vol.11(3), pp.362-377
2017
Abstract
Attention deficit/hyperactivity disorder (ADHD) is a psychological condition characterized by inattention and hyperactivity. Cognitive deficits are commonly observed in ADHD patients, including impaired working memory, processing speed, and fluid intelligence, the three of which are theorized to be closely associated with one another. In this study, we aimed to determine if decreased fluid intelligence was associated with ADHD, and was mediated by deficits in working memory and processing speed. This study tested 142 young adults from the general population on a range of working memory, processing speed, and fluid intelligence tasks, and an ADHD self-report symptoms questionnaire. Results showed that total and hyperactive ADHD symptoms correlated significantly and negatively with fluid intelligence, but this association was fully mediated by working memory. However, inattentive symptoms were not associated with fluid intelligence. Additionally, processing speed was not associated with ADHD symptoms at all, and was not uniquely predictive of fluid intelligence. The results provide implications for working memory training programs for ADHD patients, and highlight potential differences between the neuropsychological profiles of ADHD subtypes.
Details
- Title
- Working memory - not processing speed - mediates fluid intelligence deficits associated with attention deficit/hyperactivity disorder symptoms
- Authors/Creators
- C.R. Brydges (Author/Creator) - Murdoch UniversityK.L. Ozolnieks (Author/Creator) - Murdoch UniversityG. Roberts (Author/Creator) - Murdoch University
- Publication Details
- Journal of Neuropsychology, Vol.11(3), pp.362-377
- Publisher
- Wiley
- Identifiers
- 991005542941607891
- Copyright
- The British Psychological Society
- Murdoch Affiliation
- School of Psychology and Exercise Science
- Language
- English
- Resource Type
- Journal article
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 1 Clinical & Life Sciences
- 1.7 Neuroscanning
- 1.7.1026 Intelligence
- Web Of Science research areas
- Psychology
- Psychology, Experimental
- ESI research areas
- Psychiatry/Psychology