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31.
32.
Atypical depression: enhanced right hemispheric dominance for perceiving emotional chimeric faces 总被引:2,自引:0,他引:2
Bruder GE Stewart JW McGrath PJ Ma GJ Wexler BE Quitkin FM 《Journal of abnormal psychology》2002,111(3):446-454
Two studies compared hemispatial bias for perceiving chimeric faces in patients having either atypical or typical depression and healthy controls. A total of 245 patients having major depressive disorder (MDD) or dysthymia (164 with atypical features) and 115 controls were tested on the Chimeric Faces Test. Atypical depression differed from typical depression and controls in showing abnormally large right hemisphere bias. This was present in patients having either MDD or dysthymia and was not related to anxiety, physical anhedonia, or vegetative symptoms. In contrast, patients having MDD with melancholia showed essentially no right hemisphere bias. This is further evidence that atypical depression is a biologically distinct subtype and underscores the importance of this diagnostic distinction for neurophysiologic studies. 相似文献
33.
Various attempts have been made to subdivide the corpus callosum (CC) into anatomically and functionally distinct subareas. A promising current approach is the use of factor analytic techniques in conjunction with traced MRI images. The traced images are divided into 99 percentile slices, where the widths of the percentile slices are used as variables that are entered into the analysis (Denenberg, Kertesz & Cowell, 1991). Studies that use this technique agree broadly between 6 and 7 factors, but available factor solutions contain inconsistencies and large gaps, which arise when many of the percentile slices do not load appreciably on any of the factors. The present study uses a larger number of brains (N = 184), all normalized, and some methodological refinements in the analysis of the traced MRI images of the CC. A stable 7 factor solution was found, and the factor structure for males and females was very similar. 相似文献
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35.
The Simon effect is the performance advantage for spatially corresponding, compared to non-corresponding, target-response
ensembles when the location of the target is task irrelevant. In four experiments, we tested the predictions of the attention-shift
account of the Simon effect. In all experiments, subjects made choice responses with respect to the identity of a central
target that followed a spatially non-informative peripheral precue. The first experiment showed a Simon effect away from the
precue when the precue was a go/no-go signal: responses to spatially non-corresponding precue-response pairs were faster than
responses to spatially corresponding precue-response pairs. The results of the second experiment suggested that this “reverse”
Simon effect was not due to inhibition. In the third experiment, a secondary working memory task required the encoding, and
later recall, of “oddball” precues. Although the Simon effect was absent, larger Simon effects towards the precue (i.e., responses
were faster to spatially corresponding, compared to non-corresponding, precue-response ensembles) were correlated with poorer
performance on the memory task. In the last experiment, the identity of completely non-informative precues was congruent,
incongruent, or unrelated to the identity of the target. With precues that were unrelated to the identity of the target, there
was a Simon effect towards the precues. Conversely, the Simon effect occurred away from the precue when the identity of the
precue was related to that of the target. The findings suggest that a shift of attention alone is not sufficient to produce
the Simon effect. Rather, the shift of attention must originate from an intentionally defined object. The results are discussed
within a framework that integrates the attention-shift and referential-coding hypotheses.
Received: 2 December 1999 / Accepted: 23 March 2000 相似文献
36.
Frederic M. Lord 《Psychometrika》1952,17(2):181-194
Under certain assumptions an expression, in terms of item difficulties and intercorrelations, is derived for the curvilinear correlation of test score on the ability underlying the test, this ability being defined as the common factor of the item tetrachoric intercorrelations corrected for guessing. It is shown that this curvilinear correlation is equal to the square root of the test reliability. Numerical values for these curvilinear correlations are presented for a number of hypothetical tests, defined in terms of their item parameters. These numerical results indicate that the reliability and the curvilinear correlation will be maximized by (1) minimizing the variability of item difficulty and (2) making the level of item difficulty somewhat easier than the halfway point between a chance percentage of correct answers and 100 per cent correct answers. 相似文献
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Huntjens RJ Peters ML Postma A Woertman L Effting M van der Hart O 《Behaviour research and therapy》2005,43(2):243-255
Patients with Dissociative Identity Disorder (DID) frequently report episodes of interidentity amnesia, that is amnesia for events experienced by other identities. The goal of the present experiment was to test the implicit transfer of trauma-related information between identities in DID. We hypothesized that whereas declarative information may transfer from one identity to another, the emotional connotation of the memory may be dissociated, especially in the case of negative, trauma-related emotional valence. An evaluative conditioning procedure was combined with an affective priming procedure, both performed by different identities. In the evaluative conditioning procedure, previously neutral stimuli come to refer to a negative or positive connotation. The affective priming procedure was used to test the transfer of this acquired valence to an identity reporting interidentity amnesia. Results indicated activation of stimulus valence in the affective priming task, that is transfer of emotional material between identities. 相似文献
40.
Contrasting linguistic and nonlinguistic processing has been of interest to many researchers with different scientific, theoretical,
or clinical questions. However, previous work on this type of comparative analysis and experimentation has been limited. In
particular, little is known about the differences and similarities between the perceptual, cognitive, and neural processing
of nonverbal environmental sounds and that of speech sounds. With the aim of contrasting verbal and nonverbal processing in
the auditory modality, we developed a new on-line measure that can be administered to subjects from different clinical, neurological,
or sociocultural groups. This is an on-line task of sound to picture matching, in which the sounds are either environmental
sounds or their linguistic equivalents and which is controlled for potential task and item confounds across the two sound
types. Here, we describe the design and development of our measure and report norming data for healthy subjects from two different
adult age groups: younger adults (18–24 years of age) and older adults (54–78 years of age). We also outline other populations
to which the test has been or is being administered. In addition to the results reported here, the test can be useful to other
researchers who are interested in systematically contrasting verbal and nonverbal auditory processing in other populations. 相似文献