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Given that the incidence of sports-related concussion is considered to have reached epidemic proportions, in the past 15 years we have witnessed an explosion of research in this field. The purpose of the current review is to compare the results provided by the different assessment tools used in the scientific literature in order to gain a better(More)
OBJECTIVE This study prospectively examined neuropsychological functioning in 2300 collegiate football players from 10 National Collegiate Athletic Association Division A universities. The study was designed to determine the presence and duration of neuropsychological symptoms after mild head injury. METHODS A nonequivalent repeated measures control group(More)
Seventy-one patients with minor head injury were given extensive neuropsychological evaluations 3 months after injury. A significant percentage of the patients demonstrated cognitive impairment, which seemed essentially unrelated to the length of unconsciousness or of posttraumatic amnesia. Impaired patients evidenced memory and visuospatial deficits.(More)
Retest effects on a diverse set of neuropsychological measures were established using a normal sample comprised of college athletes (N = 110). Results suggest that retest effects vary depending on the type of test used, but the magnitude of effect on individual tests can be quite large. Implications of using tests with large retest effects or tests without(More)
Disability following head injury varies depending on injury mechanism, neuropathology, and other factors, including medical complications. Mild head injury (Glasgow Coma Scale score 13-15) has been shown to have considerable variability in outcome. Some persons experience rapid symptom resolution whereas others continue to evidence symptoms for an extended(More)
The present example illustrates a method for assessing pattern similarity for correlation matrices from populations known to differ in clinically important respects. The data underlying previously published confirmatory factor analyses of neuropsychological traits are presented in two methods for assessing whether the matrices are similar enough to justify(More)
Trait analyses of the Luria-Nebraska's Intellectual Processes, Motor Functions, and Memory Scales were performed using multitrait-multimethod procedures and confirmatory factor analysis. Three measures each of intellectual, motor, and memory functions were administered to 161 neuropsychiatric patients. Intellectual scales (viz., Luria-Nebraska and WAIS-R)(More)
Five multifactor models, in both orthogonal and oblique versions, and a single-factor model of the WAIS-R's factor pattern were examined by confirmatory maximum likelihood factor analyses of a data matrix constructed from the results for 90 neuropsychiatric patients. None of the models fits the data matrix in an absolute sense, even though all of the models(More)