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131.
ABSTRACT— Compared with other objects, faces are processed more holistically and with a larger reliance on configural information. Such hallmarks of face processing can also be found for nonface objects as people develop expertise with them. Is this specifically a result of expertise individuating objects, or would any type of prolonged intensive experience with objects be sufficient? Two groups of participants were trained with artificial objects (Ziggerins). One group learned to rapidly individuate Ziggerins (i.e., subordinate-level training). The other group learned rapid, sequential categorizations at the basic level. Individuation experts showed a selective improvement at the subordinate level and an increase in holistic processing. Categorization experts improved only at the basic level, showing no changes in holistic processing. Attentive exposure to objects in a difficult training regimen is not sufficient to produce facelike expertise. Rather, qualitatively different types of expertise with objects of a given geometry can arise depending on the type of training. 相似文献
132.
Wellness programs in contemporary organizations are increasing in number, but attendance is low and results often are difficult to track. We examined participant and program characteristics in 2 organizations that offered extensive wellness activities. One organization considered its program successful and had been in operation for 10 years, while the other organization's program ran for 2 years and ended because of a lack of funding. In the successful program, wellness program attendance showed a relationship to time employees took off for sick days, and improved fitness produced similar results. In the less successful operation, interviews were held with mangers and employees regarding promotion and program support. Suggestions are provided for future wellness programs. 相似文献
133.
Lima FS Simioni S Bruggimann L Ruffieux C Dudler J Felley C Michetti P Annoni JM Schluep M 《Behavioural neurology》2007,18(2):81-90
Acquired behavioral changes have essentially been described in advanced multiple sclerosis (MS). The present study was designed to determine whether behavioral modifications specifically related to the MS pathological process could be identified in the initial phase of the disease, as compared to control patients with chronic, relapsing and progressive inflammatory disorders not involving the central nervous system (CNS). Eighty-eight early MS patients (Expanded Disability Status Scale score 相似文献
134.
Patients with schizophrenia (n = 24) matched with 24 normal subjects were presented with both words and pictures. On a recognition memory task, they were asked to give remember, know, or guess responses to items that were recognized on the basis of conscious recollection, familiarity, or guessing, respectively. Compared with normal subjects, patients exhibited a lower picture superiority effect selectively related to remember responses. Unlike normal subjects, they did not exhibit any word superiority effect in relation to guess responses; this explains why the overall picture superiority effect appeared to be intact. These results emphasize the need to take into account the subjective states of awareness when analyzing memory impairments in schizophrenia. 相似文献
135.
Nguyen L Borgs L Vandenbosch R Mangin JM Beukelaers P Moonen G Gallo V Malgrange B Belachew S 《Mental retardation and developmental disabilities research reviews》2006,12(2):85-96
In white matter disorders such as leukodystrophies (LD), periventricular leucomalacia (PVL), or multiple sclerosis (MS), the hypomyelination or the remyelination failure by oligodendrocyte progenitor cells involves errors in the sequence of events that normally occur during development when progenitors proliferate, migrate through the white matter, contact the axon, and differentiate into myelin-forming oligodendrocytes. Multiple mechanisms underlie the eventual progressive deterioration that typifies the natural history of developmental demyelination in LD and PVL and of adult-onset demyelination in MS. Over the past few years, pathophysiological studies have mostly focused on seeking abnormalities that impede oligodendroglial maturation at the level of migration, myelination, and survival. In contrast, there has been a strikingly lower interest for early proliferative and differentiation events that are likely to be equally critical for white matter development and myelin repair. This review highlights the Yin and Yang principles of interactions between intrinsic factors that coordinately regulate progenitor cell division and the onset of differentiation, i.e. the initial steps of oligodendrocyte lineage progression that are obviously crucial in health and diseases. 相似文献
136.
Wong AC Gauthier I Woroch B DeBuse C Curran T 《Cognitive, affective & behavioral neuroscience》2005,5(3):306-318
Expertise with print is likely to optimize visual processes for recognizing characters of a familiar writing system. Although
brain activations have been identified for words and letter strings in contrast with other stimuli, relatively little work
has focused on the neural basis of single-letter perception. English readers and Chinese-English bilinguals participated in
an ERP study and performed a 1-back identity judgment on Roman letters, Chinese characters, pseudofonts, and their string
versions. The Chinese-English bilinguals showed an enhanced N170 for both Roman letters and Chinese characters relative to
pseudofonts. For the non-Chinese readers, the N170 amplitude was larger for Roman letters relative to Chinese characters and
pseudofonts. Our results suggest that changes in relatively early visual processes underlie expert letter perception. 相似文献
137.
Letter processing in the visual system: different activation patterns for single letters and strings
James KH James TW Jobard G Wong AC Gauthier I 《Cognitive, affective & behavioral neuroscience》2005,5(4):452-466
One would expect that a lifetime of experience recognizing letters would have an important influence on the visual system.
Surprisingly, there is limited evidence of a specific neural response to letters over visual control stimuli. We measured
brain activation during a sequential matching task using isolated characters (Roman letters, digits, and Chinese characters)
and strings of characters. We localized the visual word form area (VWFA) by contrasting the response to pseudowords against
that for letter strings, but this region did not show any other sign of visual specialization for letters. In addition, a
left fusiform area posterior to the VWFA was selective for letter strings, whereas a more anterior left fusiform region showed
selectivity for single letters. The results of different analyses using both large regions of interest and inspections of
individual patterns of response reveal a dissociation between selectivity for letter strings and selectivity for single letters.
The results suggest that reading experience fine-tunes visual representations at different levels of processing. An important
conclusion is that the processing of nonpronounceable letter strings cannot be assumed to be equivalent to single-letter perception. 相似文献
138.
Expertise training with novel objects leads to left-lateralized facelike electrophysiological responses 总被引:7,自引:0,他引:7
Scalp event-related potentials (ERPs) in humans indicate that face and object processing differ approximately 170 ms following stimulus presentation, at the point of the N170 occipitotemporal component. The N170 is delayed and enhanced to inverted faces but not to inverted objects. We tested whether this inversion effect reflects early mechanisms exclusive to faces or whether it generalizes to other stimuli as a function of visual expertise. ERPs to upright and inverted faces and novel objects (Greebles) were recorded in 10 participants before and after 2 weeks of expertise training with Greebles. The N170 component was observed for both faces and Greebles. The results are consistent with previous reports in that the N170 was delayed and enhanced for inverted faces at recording sites in both hemispheres. For Greebles, the same effect of inversion was observed only for experts, primarily in the left hemisphere. These results suggest that the mechanisms underlying the electrophysiological face-inversion effect extend to visually homogeneous nonface object categories, at least in the left hemisphere, but only when such mechanisms are recruited by expertise. 相似文献
139.
Holistic processing, a hallmark of face perception, is often measured in the so-called composite paradigm, in which participants are asked to match part of a stimulus while ignoring another part. In prior work, we recommended against the use of one version of the composite task we call the partial design, on the basis of confounds with response biases. Rossion wrote a lengthy piece that reviews the work that he has published using this design, raising a large number of criticisms, both about an alternative measure of holistic processing that we have used and advocated (which we call the complete design) and about our work in general. In this reply, we have limited our discussion to those issues that would be relevant to a researcher looking to decide which version of this composite paradigm to use, as we doubt a comprehensive reply would be of significant interest outside a very small circle. 相似文献
140.
This study explores the relative contribution of the overall quality of attachment to the mother, to the father and to peers (Inventory of Parent and Peer Attachment scales), the style of attachment towards peers (Attachment Questionnaire for Children scale), the social rank variables (submissive behavior and social comparison), and sex and age variables in predicting the depression score (Center of Epidemiological Studies Depression Scale) on a non-psychiatric sample of 13-18 year old adolescents (n = 225). Results of our integrated model (adjusted R-Square of .50) show that attachment variables (overall quality of attachment to the father and to the mother), social rank variables (social comparison and submissive behavior), age and sex are important in predicting depressive symptoms during adolescence. Moreover, the attachment to peers variables (quality of attachment to peers, secure and ambivalent style of attachment) and sex are mediated by the social rank variables (social comparison and submissive behavior). 相似文献