The DOI matches its Crossref record; 38 of the 39 references it cites were found in a registry or an index.
Impaired extra-dimensional shift performance in medicated and unmedicated Parkinson's disease: Evidence for a specific attentional dysfunction
Abstract
Groups of patients with Parkinson's disease, either medicated, or unmedicated and early in the course, together with age- and IQ-matched control subjects were tested in two paradigms measuring different aspects of selective attention. The first set of tests compared visual discrimination learning following intra- and extra-dimensional shifts, using a "total change" design in which each shift was made in the presence of novel exemplars of the compound stimuli used as discriminanda. The second test consisted of a visual search task in which the number of alternatives was varied. The results of the first experiment showed a selective deficit in both groups of Parkinsonian subjects in their ability to perform an extra-dimensional shift. In the visual search task, the patients were less accurate, but responded with equivalent choice reaction times to those of controls. The results are discussed in terms of the nature of the attentional dysfunction that occurs in Parkinson's disease.
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“Previous studies have reported that some persons with PD demonstrate reduced inhibition of task-irrelevant information (Canavan et al., 1989; Downes et al., 1989).”
From Perception of Physical Demand, Mental Demand, and Performance: A Comparison of Two Voice Interventions for Parkinson's Disease (2022) · cites this paper as Downes et al., 1989
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Davidson, M. C., Amso, D., Anderson, L. C., & Diamond, A. (2006) · Neuropsychologia · doi:10.1016/j.neuropsychologia.2006.02.006 · Cited by 2,226
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Metadata
- Authors
- Downes, J. J., Roberts, A. C., Sahakian, B. J., Evenden, J. L., Morris, R. G., & Robbins, T. W.
- Affiliations
- University of Cambridge (GB)
- Corresponding author
- Robbins, T.W.
- Venue
- Neuropsychologia
- Publisher
- Elsevier BV
- Published
- 1989-01
- Volume
- 27
- Issue
- 11-12
- Pages
- 1329-1343
- ISSN
- 0028-3932 (ISSN-L)
- OpenAlex
- W2062147269
- Cited by
- 527
- References
- 39
- Citations by year
- 2026: 2 · 2025: 4 · 2024: 15 · 2023: 8 · 2022: 10 · 2021: 14 · 2020: 8 · 2019: 9 · 2018: 12 · 2017: 14 · 2016: 16 · 2015: 26 · 2014: 12 · 2013: 18 · 2012: 14
- FWCI
- 4.56
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Neuropsychologia (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Wellcome Trust
- Topics
- Health Sciences › Medicine › Clinical Neurology › Parkinson's Disease Mechanisms and Treatments
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Cognitive Functions and Memory
- Keywords
- Parkinson's disease, selective attention, attentional dysfunction, visual discrimination learning, visual search, medication effects, early-stage Parkinson's disease, choice reaction time
- MeSH terms
- Aged, Attention, Drug Therapy, Combination, Female, Form Perception, Humans, Levodopa, Male, Middle Aged, Neuropsychological Tests, Parkinson Disease, Pattern Recognition, Visual, Psychomotor Performance, Reaction Time, Trihexyphenidyl, Neurocognitive Disorders
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