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401.
Wagner F. Gattaz 《Personality and individual differences》1981,2(1):57-60
In an earlier study HLA-B27 was found to correlate with some subgroups of schizophrenia, having an increased incidence specially in the subgroup of patients with poor prognostic features.In order to study a possible association between the P-score from the Eysenck Personality Questionnaire and HLA-B27, two subgroups of chronic paranoid schizophrenic patients selected according to the same diagnostic criteria were compared. P-scores were significantly higher in the subgroup of patients showing HLA-B27, when compared with patients without HLA-B27 (p < 0.02).This finding gives support to the hypothesis of a genetic factor underlying P, and indicates the possibility of using P-scores in the selection of more homogeneous patients groups for other researches, as well as a factor in prognostic prediction. 相似文献
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403.
The Bender Visual-motor Gestalt Test and Beery's Developmental Test of Visual-motor Integration were administered to 51 educable mentally retarded boys ranging in age from 72 to 161 mo. These scores were compared with scores boys received on three gross motor tasks by computing simple correlation coefficients and multiple regression coefficients with Bender and Beery's tests as dependent variables. The simple rs were similar but order of inclusion of independent variables in the regression analysis suggests differences. 相似文献
404.
A straightforward method for dealing with the effect of response productivity when comparing individual scoring categories between groups was presented along with an example. It was contended that percentage comparisons based on group data can circumvent the reliability problems associated with percentage scores derived from single protocols. Other problems connected with ratio and percentage scores were discussed. 相似文献
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406.
G. William Farthing James M. Wagner Stephen Gilmour Howard M. Waxman 《Learning and motivation》1977,8(4):520-532
Six pigeons were trained to asymptotic performance on a variable-delay matching-to-sample task in which the samples were sometimes line or color elements and sometimes line-color compounds. On compound-sample trials, the comparison stimuli were sometimes color elements and sometimes line-tilts. Sample type and delay (0, 1.5, and 4.5 sec) were varied within sessions, and sample duration (.4, 1.0, and 3.0 sec) was varied between sessions. Forgetting curves were steeper for line-tilt than for color. As sample duration increased, matching performance improved more for colors than for line-tilts, especially at delays greater than zero. Performance was better with element samples than with compound samples only on the line-tilt dimension at zero delay. Some predictions of a unitary trace growth and decay theory of pigeon short-term memory were not confirmed. A dual-code hypothesis was proposed to account for the data. 相似文献
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408.
Twenty-one Ss scaled the Delboeuf illusion by the methods of pair comparisons, constant stimulus differences, reproduction, and pair reproduction. The method of pair comparisons was clearly superior on all indices of validity, reliability, and efficiency. Pair comparisons forces the S to discriminate between treatment levels and avoids motor responses. Es should consider using pair comparisons or related methods which share these advantages. 相似文献
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FUNCTIONAL MAGNETIC RESONANCE IMAGING OF SEMANTIC MEMORY PROCESSES IN THE FRONTAL LOBES 总被引:10,自引:0,他引:10
John D.E. Gabrieli John E. Desmond Jonathan B. Demb Anthony D. Wagner Maria V. Stone Chandan J. Vaidya Gary H. Glover 《Psychological science》1996,7(5):278-283
Abstract— Frontal-lobe activation during semantic memory performance was examined using functional magnetic resonance imaging (fMRI), a noninvasive technique for localizing neural activity associated with cognitive function. Left inferior prefrontal cortex was more activated for semantic than for perceptual encoding of words, and for initial than for repeated semantic encoding of words. Decreased activation for semantic encoding of repeated words reflects repetition priming, that is, implicit retrieval of memory gained in the initial semantic encoding of a word. The left inferior prefrontal region may sub-serve semantic working memory processes that participate in semantic encoding and that have decreased demands when such encoding can be facilitated by recent semantic experience. These results demonstrate that fMRI can visualize changes in an individual's brain function associated with the encoding and retrieval of new memories. 相似文献