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41.
Visual information about the location of the hand in space plays a key role in many theories of the development of reaching. Empirical data casts doubt on this assumption, although vision of the hand is clearly used by adults. The current study investigated the role of vision in 15-month-olds' reaching, manipulating both the precision demands of the task and the level of visual information available. Infants reached for both large and small objects, presented with visual feedback of the target and hand (full lighting), or with visual feedback of only the target object (glowing object in the dark). In contrast to findings with younger infants, 15-month-olds' reaches were sensitive to changes in precision demands and visual feedback, reflecting corrective movements that become necessary as reaching tasks become more challenging. Furthermore, these kinematic alterations are similar to those seen in adults, suggesting that visual guidance may become more important over the course of development, as infants engage in increasingly higher precision tasks.  相似文献   
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This study builds on past research on normative publication practices in the communication discipline by exploring rates of contribution to the discipline’s literature as represented in the Communication Institute for Online Scholarship’s ComAbstracts database. The ComAbstracts database, spanning 90 years and more than 46,000 publications, provides significantly greater breadth and depth than previously available data sources. The strategy for sampling scholars included in this study also differs from prior work by limiting the sample to scholars affiliated with the communication field through membership in one of its primary professional societies. For purposes of studying historical change in productivity, the sample of scholars was divided into six cohorts at different points in their careers to discover norms for publication productivity at milestone intervals following career onset, defined as the date of award of the Ph.D. or an equivalent terminal degree. Among other findings, results suggest (a) that rates of contribution of single‐authored articles have fallen significantly over the years without compensating increases in the number of multiauthored publications, (b) that an early high rate of publication productivity is highly predictive of a sustained high rate, and (c) that more than one third of the membership of the scholars sample had not contributed any articles to the field’s mainline periodical literature. As well, a metric for determining exceptionally high and low productivity rates by career stage is suggested and illustrated, revealing a way of identifying top‐tier and subnormal productivity adjusted for years in career.  相似文献   
44.
Suicide among older people, especially men, is a significant problem. In this study the applicability of the compensatory, the risk-protective, the challenge, and the protective-protective models of resiliency for the prediction of suicidal ideation from depression (the risk factor) and sense of belonging to the community (the protective factor) was investigated. A total of 351 retired Australians (130 males and 221 females), with a mean age of 71.31 years (SD = 7.99), completed the Zung Depression Scale, the suicide subscale of the General Health Questionnaire, and the Sense of Belonging Instrument. When sense of belonging (psychological) was the protective factor, results indicated support for the risk-protective model for men and women, and for the compensatory model for women only. In contrast, when sense of belonging (antecedents) was the protective factor, support was evident for the compensatory model for men and women, and for the challenge model for women only. Results indicate that interventions should be developed to enhance sense of belonging among aging adults.  相似文献   
45.
The relation between worrying and individuals' concerns was examined in a sample of 197 college students. Participants described the five undesirable outcomes that they thought about most often, indicated how likely they thought the outcomes were, and how upset they would be by them. Worry severity was measured using the Penn State Worry Questionnaire. The relation between worry severity and the life domains about which individuals were concerned was quite weak. In contrast, as predicted, greater worry was associated with higher probability and cost estimates. In addition, cost estimates moderated the relation between worry severity and probability estimates. The potential importance of perceived threat for understanding worrying is discussed.  相似文献   
46.
The present study examined expression of the immediate-early gene, c-Fos, following acquisition, 48-h (recent) recall, and 1-week (remote) recall of a socially transmitted food preference (STFP) in multiple brain regions implicated in learning and memory. In comparisons with controls, trained Long-Evans rats had increased Fos immunoreactivity in the ventral hippocampus following acquisition and recent recall. In the parahippocampal cortices, Fos was increased in the lateral entorhinal cortex after acquisition. In the orbitofrontal cortex, increased Fos immunoreactivity was observed in the lateral orbital cortex following both recent and remote recall and in the ventral orbital cortex following remote recall, indicating a role for the orbitofrontal cortex in the remote recall of STFP memory. In contrast, in the medial prefrontal cortex, increased Fos-ir was found following acquisition in the prelimbic cortex and following recent recall in the prelimbic and infralimbic cortices. No differences in Fos expression were found between trained rats and controls in the dorsal hippocampus, posterior parietal cortex, or amygdala. The present findings support a time-limited role of the hippocampus in the acquisition and recall of STFP memory and implicate neocortical regions involved in STFP acquisition, recent, and remote recall.  相似文献   
47.
Two studies tested the hypothesis that certain positive emotions speed recovery from the cardiovascular sequelae of negative emotions. In Study 1, 60 subjects (Ss) viewed an initial fear-eliciting film, and were randomly assigned to view a secondary film that elicited: (a) contentment; (b) amusement; (c) neutrality; or (d) sadness. Compared to Ss who viewed the neutral and sad secondary films, those who viewed the positive films exhibited more rapid returns to pre-film levels of cardiovascular activation. In Study 2, 72 Ss viewed a film known to elicit sadness. Fifty Ss spontaneously smiled at least once while viewing this film. Compared to Ss who did not smile, those who smiled exhibited more rapid returns to pre-film levels of cardiovascular activation. We discuss these findings in terms of emotion theory and possible health-promoting functions of positive emotions.  相似文献   
48.
In recent years, there has been a growing controversy surrounding gentle teaching. This paper explores the nature of this controversy with particular reference to the relationship between gentle teaching and applied behavior analysis. Advantages and disadvantages of this approach are discussed, and it is suggested that gentle teaching and applied behavior analysis need not be regarded as mutually exclusive approaches to working with persons with mental retardation.  相似文献   
49.
Assessment and Prediction of Stress-Related Growth   总被引:24,自引:0,他引:24  
This article reports the development of the Stress-Related Growth Scale (SRGS) and its use in a study examining determinants of stress-related positive outcomes for college students. Study 1 analyses showed that the SRGS has acceptable internal and test-retest reliability and that scores are not influenced by social desirability. Study 2 analyses showed that college students' SRGS responses were significantly related to those provided by friends and relatives on their behalf. Study 3 analyses tested the determinants of stress-related growth longitudinally. Significant predictors of the SRGS were (a) intrinsic religiousness; (b) social support satisfaction; (c) stressfulness of the negative event; (d) positive reinterpretation and acceptance coping; and (e) number of recent positive life events. The SRGS was also positively related to residual change in optimism, positive affectivity, number of socially supportive others, and social support satisfaction, lending further support to the validity of this new scale. Results have implications for current theory on stress-related positive outcomes.  相似文献   
50.
OBJECTIFICATION THEORY   总被引:35,自引:5,他引:30  
This article offers objectification theory as a framework for understanding the experiential consequences of being female in a culture that sexually objectifies the female body. Objectification theory posits that girls and women are typically acculturated to internalize an observer's perspective as a primary view of their physical selves. This perspective on self can lead to habitual body monitoring, which, in turn, can increase women's opportunities for shame and anxiety, reduce opportunities for peak motivational states, and diminish awareness of internal bodily states. Accumulations of such experiences may help account for an array of mental health risks that disproportionately affect women: unipolar depression, sexual dysfunction, and eating disorders. Objectification theory also illuminates why changes in these mental health risks appear to occur in step with life-course changes in the female body.  相似文献   
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