Lexical retrieval in left and right brain lesioned children |
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| Authors: | D M Aram B L Ekelman H A Whitaker |
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| Affiliation: | 1. Department of Psychology, The University of Chicago, 5848 South University Ave, Chicago, IL 60637, United States;2. Department of Psychology, Stanford University, Jordan Hall, 450 Serra Mall, BLDG 420, Stanford, CA 94305, United States;1. Duke University School of Medicine (AJ Hish), Durham, NC;2. Department of Pediatrics, Duke University (CT Wood, JB Howard, and EM Perrin), Vienna, Austria;3. Duke Center for Childhood Obesity Research, Duke University School of Medicine (CT Wood, JB Howard, and EM Perrin), Durham, NC;4. Division of General Pediatrics and Adolescent Medicine, Department of Pediatrics, University of North Carolina at Chapel Hill School of Medicine (KB Flower);5. Department of Pediatrics, School of Medicine/Bellevue Hospital Center, New York University (HS Yin), New York, NY;6. Center for Health Services Research, Vanderbilt University Medical Center (RL Rothman), Nashville, Tenn;7. University of Miami School of Medicine (AM Delamater), Miami, Fla;8. Department of Pediatrics, Center for Policy, Outcomes and Prevention, Stanford University (LM Sanders), Stanford, Calif;9. Department of Biostatistics, Vanderbilt University School of Medicine (A Bian and JS Schildcrout), Nashville, Tenn;1. Samford University, Department of Psychology, 800, Lakeshore, Dr. Birmingham, AL 35229, USA;2. Texas Christian University, Karyn Purvis Institute of Child Development, TCU Box 298921, Fort Worth, TX 76129, USA |
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| Abstract: | Performance on two measures of lexical retrieval for 19 left and 13 right brain lesioned children was compared to that of control subjects matched by age, sex, race, and social class. On the Word-Finding Test, left lesioned subjects were significantly slower in response time than left controls when given semantic and visual cues and made more errors when given rhyming cues. On the Rapid Automatized Naming Test, left lesioned subjects were significantly slower than left controls in naming all semantic categories, including colors, numbers, objects, and letters. In contrast, right lesioned subjects responded as quickly as or more quickly than did right controls in all access conditions and in naming semantic categories yet tended to produce more errors than their controls, suggesting a speed-accuracy tradeoff. Children sustaining left brain lesions before 1 year of age appeared to be as impaired as those whose lesions occurred after 1 year of age. Diverse lesion sites within the left hemisphere were associated with increased lexical retrieval latencies. |
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