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Base-rate effects in category learning: a comparison of parallel network and memory storage-retrieval models 总被引:1,自引:0,他引:1
W K Estes J A Campbell N Hatsopoulos J B Hurwitz 《Journal of experimental psychology. Learning, memory, and cognition》1989,15(4):556-571
Exemplar-memory and adaptive network models were compared in application to category learning data, with special attention to base rate effects on learning and transfer performance. Subjects classified symptom charts of hypothetical patients into disease categories, with informative feedback on learning trials and with the feedback either given or withheld on test trials that followed each fourth of the learning series. The network model proved notably accurate and uniformly superior to the exemplar model in accounting for the detailed course of learning; both the parallel, interactive aspect of the network model and its particular learning algorithm contribute to this superiority. During learning, subjects' performance reflected both category base rates and feature (symptom) probabilities in a nearly optimal manner, a result predicted by both models, though more accurately by the network model. However, under some test conditions, the data showed substantial base-rate neglect, in agreement with Gluck and Bower (1988b). 相似文献
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Parents' teaching strategies with their children: The effects of parental and child status variables
Anthony D. Pellegrini Gene H. Brody Irving E. Sigel 《Journal of psycholinguistic research》1985,14(6):509-521
The intent of the study was to examine the effects of parental (mother and father) and child (gender and communicative status) status variables on the teaching strategies used by parents in a paper-folding task. The linguistic and nonverbal strategies of 120 parent-child groupings were analyzed during paper-folding tasks. Parents' strategies were coded according cognitive demand and directiveness. Results indicated that strategies varied as a function of children's communicative status. Parents were less directive and more demanding of nonhandicapped children compared to handicapped children. Parents' strategies seemed to be determined by children's ability to sustain discourse. Results are discussed in terms of Vygotsky's notion of the zone of proximal development.This research was partially supported by a grant from the U.S. Office of Education, Office of Special Education (Grant No. G007902000) to I. Sigel and A. McGillicuddy-DeLisi at Educational Testing Service, Princeton, and from the Biomedical Research Support Grant Program, Division of Research Resources, N.I.H. (Grant No. BRSG 507RR07025-17) to the first two authors. We acknowledge the helpful comments of two anonymous reviewers. 相似文献
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Michael Lyvers B.A. Gayle Boyd Ph.D. Irving Maltzman Ph.D. 《Integrative psychological & behavioral science》1987,22(1):7-15
Effects of smoking on spontaneous bilateral skin conductance were studied as a consequence of interactions with set and setting. Bilateral skin conductance was recorded in six men and six women who smoked and an equal number of nonsmokers on two different days. On the first day, spontaneous electrodermal activity was recorded before and after a 10-minute rest period during which half the smokers smoked a cigarette. On the second day, one week later, spontaneous activity was again recorded before and after a 10-minute rest period during which the remaining smokers smoked a cigarette. Nonsmokers did not smoke at any time. Following smoking there was a significant negative correlation between a preference for visual over nonvisual imagery and spontaneous skin conductance responsivity in the left as compared to the right hand. Correlations were significantly different in smokers and nonsmokers. Smokers showed significantly greater preferences for either visual or nonvisual imagery than nonsmokers. Nonresponding nonsmokers were higher on the psychoticism (P) scale of the Eysenck Personality Questionnaire (EPQ) than responding nonsmokers. Smokers scored higher on P than nonsmokers. Interactions between personality, cognitive style, and the experimental situation, set, and setting were discussed in relation to the arousing effects of nicotine. 相似文献
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Edward A. Wasserman Kim Kirkpatrick-Steger Linda J. Van Hamme Irving Biederman 《Psychological science》1993,4(5):336-341
Abstract— Two experiments investigated the role of spatial organisation in the discrimination and generalization of complex visual stimuli by pigeons. In Experiment 1, after pigeons had been trained to discriminate line drawings of four objects, they were tested with novel pictures in which the same component parts of the objects were spatially rearranged. The spatially scrambled pictures led to a dramatic drop in recognition accuracy, hut responding remained above chance. In Experiment 2, pigeons reached a high level of discriminative performance when required to choose among four different spatial arrangements of the same object parts. These results confirm Cerella's (1980) conclusion that pigeons discriminate the component parts of complex visual stimuli, but. unless it is assumed that the scrambling deleted or created emergent features, the results disconfirm his conclusion that spatial organization plays no role in pigeons' picture perception. 相似文献
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Through honing its collective memory, especially after the Holocaust, the Jewish community has attempted to sustain its culture, bolster the Jewish identity of its members, and regain a resolute sense that its narrative is again proceeding. To some degree, all these aims are realized by instilling in its members the Jewish modal character structure: a psychological configuration with two contrastable entities. One chronically discomposed self-structure, defining itself as polluted and helpless, trembles with the appalling imagery of historical and imminent community disasters. The other entity believes in its unmatched capacity for reparative, socially beneficial actions. The paradigm of this psychological organization is found in many children of survivors. The memory of a tragic history abides alongside the community's hopes in the Jewish modal personality. The need to set forth and accommodate these two motifs imprints upon the Jewish "national" character many of its distinctive qualities. The designs of the Jewish community for this particularly Jewish twofold personality formation are augmented by the personal revelations of survivors. Therefore, Holocaustic testimonies are invested with a sacred aura. In measure, these recitals of the disaster with their stark images, plus the clashing affects aroused in the reader toward main characters of the narrative, dictate the way Jews define themselves in the world and the way they live. A confluence of being covertly commissioned by the Jewish community joins with the narrators' more idiosyncratic longings. Together they generate a steady stream of Holocaustic accounts. Complementary vectors drive the reader to peruse these records. The results therefrom, intimate knowledge of the disaster, plus the twofold personality motifs stamp many Jews as scions of the Holocaust. 相似文献