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31.
32.
Motion in the mind’s eye: Comparing mental and visual rotation 总被引:1,自引:0,他引:1
Mental rotation is among the most widely studied visuospatial skills in humans. The processes involved in mental rotation
have been described as analogous to seeing an object physically rotate. We used functional magnetic resonance imaging of the
whole brain and localized motion-sensitive hV5/MT1 to compare brain activation for stimuli when they were mentally or visually
rotated. The results provided clear evidence for activation in hV5/MT1 during both mental and visual rotation of figures,
with increased activation for larger rotations. Combined with the overall similarities between mental and visual rotation
in this study, these results suggest that mental rotation recruits many of the same neural substrates as observing motion. 相似文献
33.
Intergroup contact and pluralistic ignorance 总被引:5,自引:0,他引:5
The present work examined the relationship between people's own interpretations of why they avoid intergroup contact and their interpretations of why out-groups avoid intergroup contact. Studies 1 and 2 demonstrate that Whites and Blacks would like to have more contact with the out-group but believe the out-group does not want to have contact with them. Studies 3-5 show that Whites and Blacks make divergent explanations about their own and their potential out-group partner's failure to initiate contact. Specifically, individuals explained their own inaction in terms of their fear of being rejected because of their race but attributed the out-group members' inaction to their lack of interest. Study 6 examined the behavioral consequences of this self-other bias. Finally, Study 7 applied theoretical work on the extended contact hypothesis to explore a means to reduce this self- other bias. The implications of these studies for improving intergroup interactions are discussed. 相似文献
34.
This study examined the role that dimensions of racial identity play regarding the antecedents and consequences of perceived racial discrimination among African Americans. A total of 267 African American college students completed measures of racial identity, perceived racial discrimination, and psychological distress at 2 time points. After controlling for previous perceptions of discrimination, racial centrality was positively associated with subsequent perceived racial discrimination. Additionally, perceived discrimination was positively associated with subsequent event-specific and global psychological distress after accounting for previous perceptions of discrimination and distress. Finally, racial ideology and public regard beliefs moderated the positive relationship between perceived discrimination and subsequent distress. The results illustrate the complex role racial identity plays in the lives of African Americans. 相似文献
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What properties determine visually perceived space? We discovered that the perceived relative distances of familiar objects in natural settings depended in unexpected ways onthe surrounding visual field. Observers bisected egocentric distances in a lobby, in a hallway, and on an open lawn. Three key findings were the following: (1) Perceived midpoints were too far from the observer, which is the opposite of the common foreshortening effect. (2) This antiforeshortening constant error depended on the environmental setting--greatest in the lobby and hall but nonsignificant on the lawn. (3) Context also affected distance discrimination; variability was greater in the hall than in the lobby or on the lawn. A second experiment replicated these findings, using a method of constant stimuli. Evidently, both the accuracy and the precision of perceived distance depend on subtle properties of the surrounding environment. 相似文献
38.
We investigated the associations among perceived fidelity to family-centered systems of care, family empowerment, and improvements
in children's problem behaviors. Participants included 79 families, interviewed at two time points across a one-year period.
Paired samples t-tests indicated that problem behaviors decreased significantly across a one-year period. Hierarchical multiple regressions
indicated that both fidelity to family-centered systems of care and family empowerment independently predicted positive change in children's problem behavior over a one-year period. However, when family empowerment is entered
first in the regression, the relationship between fidelity to family-centered systems of care and change in children's problem
behavior drops out, indicating that family empowerment mediates the relationship between family-centered care and positive
changes in problem behaviors. Consistent with other literature on help-giving practices, family empowerment appears to be
an important mechanism of change within the system of care philosophy of service delivery. Implications for practice and staff
training are discussed. 相似文献
39.
The purpose of the present studies was to evaluate the utility of a group-administered version of the n-back, or lag task. Experiments 1 and 2 describe the construction of the task and reveal that the modified lag task (MLT) produces the same performance trends as have been observed in individually administered versions of the lag task; performance decreased significantly as lag conditions increased in difficulty. Experiments 3 and 4 established convergent validity by comparing the MLT to another common working memory task, the operation-word span task, as well as the updated version of this task, the automatic operation span task. The results showed that MLT performance was significantly correlated to scores on both measures. These experiments provide important details about the MLT as a measure of working memory, in a group- or individual-administration setting. 相似文献
40.
J R Shelton R C Martin 《Journal of experimental psychology. Learning, memory, and cognition》1992,18(6):1191-1210
Priming for semantically related concepts was investigated using a lexical decision task designed to reveal automatic semantic priming. Two experiments provided further evidence that priming in a single presentation lexical decision task (McNamara & Altarriba, 1988) derives from automatic processes. Mediated priming, but no inhibition or backward priming was found in this type of lexical decision task. Experiments 3 and 4 demonstrated that automatic priming was found only for associated word pairs, as determined by word association norms, and not for word pairs that are semantically related but not associated. It is argued that automatic priming in the lexical decision task occurs at a lexical level not at a semantic level. 相似文献