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If the material conditions of culture shape cognitive structures, as Luria and Vygotsky argued, the extraordinarily deep and rapid restructuring of historical forms (Luria, 1971, 265) in the Soviet Republics that followed the Bolshevik revolution of 1917 provided a natural laboratory to determine whether processes of modernization changed traditional ways of thinking. This was the purpose of Luria's 1931 expedition to the Soviet Republic of Uzbekistan in central Asia. Luria's initial reports attracted vitriolic criticism because he had allegedly belittled primitive Uzbeki culture. The lasting importance of the Uzbek expedition is its emphasis on culture as a determinant of cognitive processes that remains valid to the present: in 1984, Gilbert replicated Luria's field studies in South Africa with near-identical results. Yet current neuropsychology has been slow to recognize the need for culturally sensitive assessment. 相似文献
134.
Prehension movements of the right hand were recorded in a right-handed man (AC), with an injury to the left posterior parietal cortex (PPC) and with a section of the left half of the splenium. The kinematic analysis of AC's grasping movements in direct and perturbed conditions was compared to that of five control subjects. A novel effect in prehension was revealed--a hemispace effect--in healthy controls only. Movements to the left hemispace were faster, longer, and with a smaller grasp aperture; perturbation of both object position and distance resulted in the attenuation of the direction effect on movement time and the time to velocity peak, with a reverse pattern in the time to maximum grip aperture. Nevertheless, the correlation between transport velocity amplitude and grasp aperture remained stable in both perturbed and non-perturbed movements, reflecting the coordination between reaching and grasping in control subjects. In contrast, transport and grasp, as well as their coordination in both direct and perturbed conditions, were negatively affected by the PPC and splenium lesion in AC, suggesting that transport and grasp rely on two functionally identifiable subsystems. 相似文献
135.
We provide a quantifier-free axiom system for plane hyperbolic geometry in a language containing only absolute geometrically meaningful ternary operations (in the sense that they have the same interpretation in Euclidean geometry as well). Each axiom contains at most 4 variables. It is known that there is no axiom system for plane hyperbolic consisting of only prenex 3-variable axioms. Changing one of the axioms, one obtains an axiom system for plane Euclidean geometry, expressed in the same language, all of whose axioms are also at most 4-variable universal sentences. We also provide an axiom system for plane hyperbolic geometry in Tarski's language L
B which might be the simplest possible one in that language. 相似文献
136.
Partial report methods have shown that a large-capacity representation exists for a few hundred milliseconds after a picture has disappeared. However,change blindness studies indicate that very limited information remains available when a changed version of the image is presented subsequently. What happens to the large-capacity representation? New input after the first image may interfere, but this is likely to depend on the characteristics of the new input. In our first experiment, we show that a display containing homogeneous image elements between changing images does not render the largecapacity representation unavailable. Interference occurs when these new elements define objects. On that basis we introduce a new method to produce change blindness: The second experiment shows that change blindness can be induced by redefining figure and background, without an interval between the displays. The local features (line segments) that defined figures and background were swapped, while the contours of the figures remained where they were. Normally, changes are easily detected when there is no interval. However, our paradigm results in massive change blindness. We propose that in a change blindness experiment, there is a large-capacity representation of the original image when it is followed by a homogeneous interval display, but that change blindness occurs whenever the changed image forces resegregation of figures from the background. 相似文献
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Cecil R. Reynolds Victor L. Willson Michael Ramsey 《Personality and individual differences》1999,27(6):423
Patterns of intellectual abilities for Mexican American and Native American Papago children were contrasted with those of White children, independent of overall differences in ability. Large differences in highly verbal skills remained, with Whites consistently outscoring the other two groups. Native Americans showed higher performance than Whites on spatial-visualization tasks but Mexican Americans exceeded Whites on no tasks. These race-related patterns of ability are nearly opposite those found in Black–White comparisons. 相似文献
139.
Questions concerning the relationship between self-rated adjustment and the Bem Sex-Role Inventory (BSRI) were examined in two studies. In Study I, whether sex-typing was defined by Bem's original t-test criterion or the newer median-split criterion, superior adjustment was associated with androgynous vs. traditional typing only among women, not men. Also in conflict with the androgyny position, adjustment differences among sex-types were accounted for by differences in masculinity, not in femininity or androgyny per se. The greater contribution of masculinity vs. femininity to self-rated adjustment may be exaggerated because BSRI femininity includes items which do not load on a unidimensional femininity factor. In Study II, inspection of these unrelated items suggested that they reduce the desirability of BSRI femininity, thereby reducing its relationship to adjustment. Comparisons between standard BSRI scoring and an alternative based on unidimensional subscales revealed that the alternative femininity subscale was judged to be more desirable, and it reduced the degree of difference between masculinity and femininity in their relationships to adjustment. Superior adjustment, however, was again associated with androgynous vs. traditional sex-typing only among women, and adjustment differences among sex-types were again accounted for by differences in masculinity.The authors acknowledge the assistance of the following persons who helped in the administration, scoring, or preparation of questionnaire materials: Jill Jamison, Eric Isberg, Kay Peter, Steve Zalinger, Walter Davis, James Ball, Mark Jensen, and Heidi Sanft. Correspondence should addressed to Dr. Louise Silvern, Psychology Department, University of Colorado, Boulder, Colorado 80309. 相似文献
140.
The purpose of this study is to compare the cognitive and motivational explanations of differences in the responsibility assigned to the victim of a crime. It has generally been found that the victim of a crime is assigned more responsibility for that crime by similar others if its consequences are severe. The motivational explanation for this finding is that subjects are threatened by the idea that a serious crime can happen by chance. The cognitive explanation is that serious crimes are rarer and subjects attribute more of the responsibility for rarer events to those who experience them. This study tested these two explanations by independently varying the severity and the likelihood of a crime and examining attributions of responsibility to its victim. The results of the study support the cognitive explanation. Similar others were found to attribute more responsibility for a crime to the victim when that crime was presented as rare, irrespective of whether its consequences were mild or severe. In addition, when likelihood was controlled experimentally no effect of severity upon attributions of responsibility was found. These results suggest that, within the context of attributions of responsibility to victims, patterns of attribution consistent with those predicted by theories suggesting motivational influences upon attribution may actually represent the operation of cognitive processes. 相似文献