Dev Neuropsychol
November 2004
Posner's covert orienting of attention paradigm has been used in many studies in the cognitive neuroscience literature to study attention. We found 9 studies in which it was used to study attention deficit hyperactivity disorder, but findings were not consistent. We present a tutorial about the paradigm's methodology and then review the studies.
View Article and Find Full Text PDFAlcohol Clin Exp Res
February 2002
Background: Sustained attention problems and impulsivity are reported in association with prenatal alcohol exposure and fetal alcohol syndrome, but research in this area is limited and contradictory.
Methods: Auditory and visual sustained attention were investigated in 265 low-income, predominantly African-American, adolescents (mean age, 15.12 years; SD, 0.
Appl Psychophysiol Biofeedback
December 1998
Five papers by Peniston and colleagues, which constitute the basic literature for alpha-theta EEG biofeedback treatment for alcoholism and posttraumatic stress disorder, are reviewed. As a result, we raise three questions: (a) Are the samples studied independent? (b) What was the clinical status of the participants prior to treatment? (c) What treatment did the participants actually receive? In seeking answers to these questions we aim to strengthen the database for neurofeedback with specific procedural information so that claims of efficacy can be tested and accepted or rejected on an objective basis.
View Article and Find Full Text PDFKosslyn's (1987) hypothesized cerebral hemispheric asymmetries for processing categorical and coordinate spatial relations were explored, using stimuli presented at varying degrees of retinal eccentricity. Thirty-three adult males performed hemifield reaction-time tasks requiring categorical or coordinate judgements. The hypothesized asymmetries were observed when stimuli were presented at 3 degrees of visual angle, but not at 1 or 9 degrees.
View Article and Find Full Text PDFJ Clin Exp Neuropsychol
April 1996
The replicability of previous evidence for differential performance between left and right temporal lobe epileptic patients on the Wisconsin Card Sorting Test (WCST) was evaluated in a new sample of candidates for focal resection. Many subjects obtained high scores on indices of perseveration, which are commonly thought to reflect frontal dysfunction, but there were no differences in performance between patients with language-dominant and nondominant temporal foci. The findings confirm existing evidence that performance decrements on the WCST can be associated with epileptic foci and focal lesions in nonfrontal brain lesions.
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