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Three experiments employing the McCollough paradigm were conducted to determine the spatial-frequency content of visual imagery. In Experiment 1, large and reliable pattern-contingent color aftereffects were obtained after adaptation to visual imagery. The direction of the aftereffects indicated that subjects were adapting to higher spatial frequencies in their imagery. These results contrast with the data of Experiment 2, which demonstrate that color aftereffects obtained with adaptation to physically present stimuli are mediated by the fundamental spatial frequency components. The magnitude of the imagery-induced aftereffects in Experiment 1 equaled the magnitude of the externally induced aftereffects obtained in Experiment 2 with the same subjects. By blurring the to-be-imaged patterns (Experiment 3), the fundamental Fourier components became the salient perceptual features of the stimuli, and the direction of the imagery-induced aftereffects was reversed from that of Experiment 1, indicating that the spatial frequency content of the imagery had changed from higher to lower frequencies. Under normal viewing conditions, subjects use the higher spatial frequencies associated with the perceptually salient edges of stimuli to construct their images. The results of Experiments 1 and 3 are discussed in light of a current controversy over the nature of information representation in imagery, and it is concluded that support has been obtained for the analog model of visual imagery. 相似文献
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Deborah Woo 《Theoretical medicine and bioethics》1991,12(1):25-43
As one aspect of China's modernization, the importation of Western psychiatric ideas poses a mystery. How are such ideas integrated with traditional assumptions? The apparently wholesale adoption of Western psychiatric categories runs counter to the fact that the Chinese have been generally reluctant to define problems in highly individualized psychiatric terms. Our lack of knowledge as to how the Chinese and Western medical models interface raises questions about the cross-cultural applicability of psychiatric theory. Ironically, the very conceptual categories intended to facilitate professional discourse obscure cultural, political, and epistemological differences between Chinese and Western thought. This paper focuses on certain incongruities in psychiatric theory and practice in order to underscore many unresolved issues that still exist with respect to our cross-cultural understandings of ‘mental illness’. Insofar as the trend has been towards standardizing methodology, taxonomies have been generated without a corresponding development in textured comparison. Originating from Western theoretical frameworks, comparative analyses have been otherwise devoid of culture-specific knowledge. The goal of this paper is to show that these categorical assumptions are still premature, and that examining the meaning of current ‘rates of mental illness’ in China specifically raises more questions than it answers. Hopefully, this discussion will stimulate a renewed interest in ethnographic methods that would uncover locally-based understandings and thereby create the basis for a more sophisticated epidemiological comparison. 相似文献
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In the age of big data, substantial research is now moving toward using digital footprints like social media text data to assess personality. Nevertheless, there are concerns and questions regarding the psychometric and validity evidence of such approaches. We seek to address this issue by focusing on social media text data and (i) conducting a review of psychometric validation efforts in social media text mining (SMTM) for personality assessment and discussing additional work that needs to be done; (ii) considering additional validity issues from the standpoint of reference (i.e. ‘ground truth’) and causality (i.e. how personality determines variations in scores derived from SMTM); and (iii) discussing the unique issues of generalizability when validating SMTM for personality assessment across different social media platforms and populations. In doing so, we explicate the key validity and validation issues that need to be considered as a field to advance SMTM for personality assessment, and, more generally, machine learning personality assessment methods. © 2020 European Association of Personality Psychology 相似文献
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Path integration while ignoring irrelevant movement 总被引:5,自引:0,他引:5
May M Klatzky RL 《Journal of experimental psychology. Learning, memory, and cognition》2000,26(1):169-186
Participants attempted to return to the origin of travel after following an outbound path by locomotion on foot (Experiments 1-3) or in a virtual visual environment (Experiment 4). Critical conditions interrupted the outbound path with verbal distraction or irrelevant, to-be-ignored movements. Irrelevant movement, real or virtual, had greater effects than verbal or cognitive distraction, indicating inability to ignore displacement during path integration. Effects of the irrelevant movement's direction (backward vs. rightward) and location (1st vs. 2nd leg of path) indicated that participants encoded a configural representation of the pathway and then cognitively compensated for the movement, producing errors directly related to the demands of compensation. An encoding-error model fit to the data indicated that backward movement produced downward rescaling, whereas movement that led to implied rotation (rightward on 2nd leg) produced distortions of shape and scale. 相似文献
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The ability of scores on the Early Prevention of School Failure battery to predict Stanford Achievement Test scores was examined. Participants included 280 first-grade students who were administered the battery at the beginning of kindergarten and the Stanford Achievement Test at the end of first grade. Principal factor analysis based on the oblique rotation exhibited simple structure between scores on the Peabody Picture Vocabulary Test-Revised, the Preschool Language Scale, and the Stanford Achievement Test (verbal or language factor), with the Draw-A-Man test and the Developmental Test of Visual-Motor Integration-Revised loading on a separate factor (motor factor). Results suggest that language-based skills were highly associated with later academic performance in school-aged children. 相似文献