Neuroscience
Effects of Practice on the Wechsler Adult Intelligence Scale-IV Across 3- and 6-Month Intervals
Clinical Neuropsychologist. 2012 Feb 21;
Estevis E, Basso MR, Combs D
Abstract
A total of 54 participants (age M = 20.9; education M = 14.9; initial Full Scale IQ M = 111.6) were administered the Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV) at baseline and again either 3 or 6 months later. Scores on the Full Scale IQ, Verbal Comprehension, Working Memory, Perceptual Reasoning, Processing Speed, and General Ability Indices improved approximately 7, 5, 4, 5, 9, and 6 points, respectively, and increases were similar regardless of whether the re-examination occurred over 3- or 6-month intervals. Reliable change indices (RCI) were computed using the simple difference and bivariate regression methods, providing estimated base rates of change across time. The regression method provided more accurate estimates of reliable change than did the simple difference between baseline and follow-up scores. These findings suggest that prior exposure to the WAIS-IV results in significant score increments. These gains reflect practice effects instead of genuine intellectual changes, which may lead to errors in clinical judgment.
PMID: 22353021 [PubMed - as supplied by publisher]
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Neuroscience
Neuropsychology Abstract of the Day: Assessment
Effects of Practice on the Wechsler Adult Intelligence Scale-IV Across 3- and 6-Month Intervals
Clinical Neuropsychologist. 2012 Feb 21;
Estevis E, Basso MR, Combs D
Abstract
A total of 54 participants (age M = 20.9; education M = 14.9; initial Full Scale IQ M = 111.6) were administered the Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV) at baseline and again either 3 or 6 months later. Scores on the Full Scale IQ, Verbal Comprehension, Working Memory, Perceptual Reasoning, Processing Speed, and General Ability Indices improved approximately 7, 5, 4, 5, 9, and 6 points, respectively, and increases were similar regardless of whether the re-examination occurred over 3- or 6-month intervals. Reliable change indices (RCI) were computed using the simple difference and bivariate regression methods, providing estimated base rates of change across time. The regression method provided more accurate estimates of reliable change than did the simple difference between baseline and follow-up scores. These findings suggest that prior exposure to the WAIS-IV results in significant score increments. These gains reflect practice effects instead of genuine intellectual changes, which may lead to errors in clinical judgment.
PMID: 22353021 [PubMed - as supplied by publisher]
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Neuropsychological Signs of Alzheimer's Disease 8 Years Prior to Diagnosis Journal of Alzheimer's Disease, 2012 Dec 19. Schmid NS, Taylor KI, Foldi NS, Berres M, & Monsch AU.AbstractWe investigated the earliest neuropsychological changes in Alzheimer's...
- Neuropsychology Abstract Of The Day: Alzheimer's Disease
Relationships Between Behavioral Syndromes and Cognitive Domains in Alzheimer Disease: The Impact of Mood and Psychosis American Journal of Geriatric Psychiatry. 2011 Nov 1; Koppel J, Goldberg TE, Gordon ML, Huey E, Davies P, Keehlisen L, Huet S, Christen...
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Perinatal cortical growth and childhood neurocognitive abilities Neurology. 2011 Oct 12; Rathbone R, Counsell SJ, Kapellou O, Dyet L, Kennea N, Hajnal J, Allsop JM, Cowan F, Edwards AD Abstract OBJECTIVE:This observational cohort study addressed the hypothesis...
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Today's recommended reading addresses proposed efficacy measures for use in clinical trials related to traumatic brain injury (TBI): Bagiella E, Novack TA, Ansel B, Diaz-Arrastia R, Dikmen S, Hart T, & Temkin N. Measuring Outcome in Traumatic Brain...
- Abstract Of The Day: Alzheimer Disease
Pavlik VN, Doody RS, Massman PJ, & Chan W. (2006). Influence of premorbid IQ and education on progression of Alzheimer's Disease. Dementia, Geriatrics, & Cognitive Disorders,22(4), 367-377. [Epub ahead of print] Department of Family and Community...