Level versus pattern of neuropsychological performance among schizophrenic and diffusely brain-damaged patients.

A response to Mapou

“…This finding was later confirmed by Satz (1966). Numerous studies of patients with diffuse neurological disorders indicate these patients generally do not have specific symptoms, and therefore do not have delineated cognitive profiles, unless one views a straight line as a profile (Chelune, Heaton, Lehman, & Robinson, 1979).…”

Reliability of the Halstead-Reitan Battery in individuals displaying acutely psychotic behavior

“…Cattell's coefficient of profile pattern similarity, rp (Cattell et al,, 1974), was then calculated for each subject. In separate operations, the rp was calculated to reflect (1) profile similarity where differences in both pattern and level of performance are considered and (2) profile similarity where only differences in pattern are considered and level of performance is controlled (Chelune et al, 1979). These results as well as the Pearson correlation coefficients for each subject are presented in Table III.…”

“…While there is a growing body of evidence showing that psychiatric patients perform in the impaired range on tests of neuropsychological functioning (Bigler et al, 1979;Chelune et al, 1979;Goldstein and Halperin, 1977;Heaton et al, 1978;Klonoffet al, 1970;Lewis et al, 1979;Malec, 1978), there has been very little research to date aimed at determining how reliable or reproducible these test results are. Undoubtedly, the very disordered and generally uncooperative behavior of the acutely psychotic patient makes test administration and interpretation a tenuous task.…”

Neuropsychology

“…The search for a neuropsychological signature of schizophrenia has for the most part remained elusive. Early investigations seemed to suggest that deficits were global and that virtually all ability realms were affected (Chelune, Heaton, Lehman, & Robinson, 1979;Seidman, 1984). However, these conclusions may have been inaccurate in that the majority of studies at that time failed to control for multiple confounding variables, although several well-controlled studies have yielded similar results (Blanchard & Neale, 1994;Braff et al, 1991).…”