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Abstract:
Goal: Investigate the neuropsychological sensitivity of the
Das-Naglieri Cognitive Assessment System (CAS) (Naglieri & Das,
1997) following stroke. Method: Two patients with right hemisphere
stroke were imaged with computed tomography (CT). Each patient was
assessed with the CAS at 7-10 days and 3 months post-stroke.
Changes in cognitive functions were then measurable using provided
mental-age norms. Results: Patient 1: 42 year old female with a
right distal middle cerebral artery occlusion. Patient 2: 55 year
old male with right anterior cerebral artery occlusion. In both
patients the cognitive function that was relatively spared was
Successive processing (X=100, S=15). In both patients Planning,
Attention and Simultaneous processing were initially depressed.
However in patient 2 there was significant improvement in
Simultaneous processing by post-test (p < 0.05). In both
patients Planning and Attention scaled scores remained well below
other cognitive functions at post-test. Discussion: The CAS is a
standardized test of cognitive functioning with age performance
norms between 5 and 18. The CAS operationalizes the
Planning-Attention/Arousal-Simultaneous-Successive (PASS) cognitive
processing model of intelligence (Das, Naglieri & Kirby, 1994).
Ongoing studies suggest that the CAS scales are sensitive to the
residual effects of stroke. Findings at the scale, subtest and
observational levels are discussed in the context of the CT
scans.
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