Focal brain lesions and intelligence: A study with a new version of Raven's colored matrices
- 4 January 1986
- journal article
- Published by Informa UK Limited in Journal of Clinical and Experimental Neuropsychology
- Vol. 8 (1), 37-50
- https://doi.org/10.1080/01688638608401295
Abstract
Contrasting results have been obtained in previous investigations, which have used the standard version of Raven's Colored Progressive Matrices for studying the effects of localized brain lesion on visual-spatial intelligence. Some of these discrepancies might be due to the fact that specific factors, such as unilateral spatial neglect, could contribute to decreased performance obtained on Raven's test by patients with focal brain lesions. A new set of Colored Matrices, devised to minimize the influence of unilateral spatial neglect without changing the essential features of the original task, was therefore constructed. The test was administered to 76 normal controls, 74 right brain-damaged patients, 87 aphasics, and 61 nonaphasic left brain-damaged patients, in order to study the effect of laterality of lesions and of language impairment on Raven's scores. The results show that, if the influence of unilateral spatial neglect is minimized and Raven's scores are corrected in reference to age, educational level, and lesion size, then: no significant differences are observed between right and left brain-damaged patients; aphasics score worse than nonaphasic left brain-damaged patients; impairment is greater in patients with Wernicke's and Global aphasia (i.e., in patients with severe language comprehension disorders) than in patients classified as Broca's, Anomic, or Conduction aphasia; impairment is greater in patients with semantic-lexical discrimination errors than in patients free from semantic-lexical comprehension disorders.Keywords
This publication has 20 references indexed in Scilit:
- Left and Right Intelligence: Case Studies of Raven's Progressive Matrices Following Brain Bisection and HemidecorticationCortex, 1981
- Poor performance of right brain-damaged patients on Raven's coloured matrices: Derangement of general intelligence or of specific abilities?Neuropsychologia, 1977
- NEUROPSYCHOLOGICAL EVIDENCE FOR THE EXISTENCE OF CEREBRAL AREAS CRITICAL TO THE PERFORMANCE OF INTELLIGENCE TASKSBrain, 1973
- Performance on the Raven's Colored Progressive Matrices Test by Subjects with Cerebral CommissurotomyCortex, 1973
- Patterns of Behavioral Deficit Associated with Visual Spatial NeglectCortex, 1969
- Les Manifestations De Negligence et D'inattention Pour L'hemispaceCortex, 1968
- The Influence of Aphasia and of the Hemispheric Side of the Cerebral Lesion on Abstract ThinkingCortex, 1966
- The Performance of Hemisphere-Damaged Patients on Spatial Intelligence TestsCortex, 1966
- The Comparative Efficiency of Intelligence and Vigilance Tests in Detecting Hemispheric Cerebral DamageCortex, 1965
- Constructional Apraxia and Hemispheric Locus of LesionCortex, 1964