Surgical disconnection of the frontal cortex and inferotemporal cortex severely impairs many aspects of visual learning and memory, including learning of new object-in-place scene memory problems, a monkey model of episodic memory. As part of a study of specialization within prefrontal cortex in visual learning and memory, we tested monkeys with…

This study examined whether children with mathematical difficulties (MDs) or comorbid mathematical and reading difficulties have a working memory deficit and whether the hypothesized working memory deficit includes the whole working memory system or only specific components. In the study, 31 10-year-olds with MDs and 37 10-year-olds with both…

The mechanisms underlying segmentation and selection of visual stimuli over time were investigated in patients with posterior parietal damage. In a modified visual search task, a preview of old objects preceded search of a new set for a target while the old items remained. In Experiment 1, control participants ignored old and prioritized new…

Because of recent developments in measurements, investigated possible covariation between hyperactivity and cerebral deficits in adolescent psychiatric inpatients. Used several different measures on 45 patients (32 boys, 13 girls). The limited amount of covariation found suggests that neuropsychological deficits may be a diffuse problem that…

Replicating previous findings that the inability to "shift" conceptual attitude on the Weigl is consistent with indices associated with cortical dysfunction, the Weigl is shown to possibly serve as a nonverbal instrument to assess cortical dysfunction where inability to "shift" appears to tap a dysfunction in symbolic rather…

Researchers investigating the cerebral information processing of visual stimuli have usually followed the pattern of stimulating the subject's eyes with light and observing accompanying changes in brain wave patterns. Such visually evoked responses (VERs) have been found to discriminate bright from dull children and dyslexic from normal readers.…

Thirty-five college students with learning disabilities (LD) and 25 students with a history of mild head injury (MHI) were compared on tests of neuropsychological, psychological, and academic achievement. Students with LD performed poorly on linguistically oriented psychoeducational tests, whereas students with MHI showed cognitive deficits in…