全文获取类型
收费全文 | 8990篇 |
免费 | 334篇 |
国内免费 | 6篇 |
专业分类
9330篇 |
出版年
2020年 | 103篇 |
2019年 | 125篇 |
2018年 | 175篇 |
2017年 | 173篇 |
2016年 | 216篇 |
2015年 | 141篇 |
2014年 | 149篇 |
2013年 | 882篇 |
2012年 | 317篇 |
2011年 | 322篇 |
2010年 | 207篇 |
2009年 | 245篇 |
2008年 | 333篇 |
2007年 | 358篇 |
2006年 | 315篇 |
2005年 | 294篇 |
2004年 | 289篇 |
2003年 | 322篇 |
2002年 | 293篇 |
2001年 | 140篇 |
2000年 | 127篇 |
1999年 | 156篇 |
1998年 | 115篇 |
1997年 | 141篇 |
1996年 | 123篇 |
1995年 | 141篇 |
1994年 | 110篇 |
1993年 | 126篇 |
1992年 | 119篇 |
1991年 | 107篇 |
1990年 | 90篇 |
1989年 | 92篇 |
1988年 | 97篇 |
1987年 | 117篇 |
1986年 | 89篇 |
1985年 | 105篇 |
1984年 | 133篇 |
1983年 | 134篇 |
1982年 | 122篇 |
1981年 | 116篇 |
1980年 | 117篇 |
1979年 | 119篇 |
1978年 | 132篇 |
1977年 | 116篇 |
1976年 | 135篇 |
1975年 | 109篇 |
1974年 | 110篇 |
1973年 | 108篇 |
1972年 | 76篇 |
1971年 | 67篇 |
排序方式: 共有9330条查询结果,搜索用时 15 毫秒
991.
Westerners' perceptions tend to focus on salient foreground objects, whereas Asians are more inclined to focus on contexts. We hypothesized that such culturally specific patterns of attention may be afforded by the perceptual environment of each culture. In order to test this hypothesis, we randomly sampled pictures of scenes from small, medium, and large cities in Japan and the United States. Using both subjective and objective measures, Study 1 demonstrated that Japanese scenes were more ambiguous and contained more elements than American scenes. Japanese scenes thus may encourage perception of the context more than American scenes. In Study 2, pictures of locations in cities were presented as primes, and participants' subsequent patterns of attention were measured. Both Japanese and American participants primed with Japanese scenes attended more to contextual information than did those primed with American scenes. These results provide evidence that culturally characteristic environments may afford distinctive patterns of perception. 相似文献
992.
Weekes N Lewis R Patel F Garrison-Jakel J Berger DE Lupien SJ 《Stress (Amsterdam, Netherlands)》2006,9(4):199-206
The purpose of the present study was to investigate basic methodological issues related to the usage of an examination stress protocol in studies of psychoneuroendocrinology. In the present study, 57 undergraduate students served as participants. All subjects provided salivary samples and completed psychological inventories during a low examination stress period and again during a high examination stress period. Salivary samples were analyzed for cortisol. Three major findings were observed. First, the examination stress protocol proved to be an effective trigger of elevations in both psychological measures of stress and in cortisol levels. Second, sex differences were observed in cortisol levels, such that males showed an elevation in cortisol during the high examination stress session whereas females did not. Finally, no significant correlations were observed between elevations in psychological measures of stress and elevations in cortisol levels. These findings suggest that the examination stress protocol used in the present study effectively elevated both psychological stress and cortisol levels. Furthermore, these findings suggest that there are biological differences in how males and females respond to stress. Finally, no evidence was found to suggest a relationship between psychological and hormonal levels of stress. Together, these findings suggest the need to better define and consider the implications of both the specific measures of stress being used and individual differences in the subject samples in psychoendocrine studies. 相似文献
993.
994.
995.
996.
A large body of research suggests that common and specific psychopathology dimensions underlie the symptoms that occur within mood and anxiety disorders. As of yet, it is unclear precisely how the facets of Anxiety Sensitivity (AS), or fear of the symptoms of fear and anxiety, relate to these latent factors. Using data from 606 adolescents participating in the baseline phase of a longitudinal study on risk factors for emotional disorders, we modeled the facets of AS as measured by the Anxiety Sensitivity Index-Expanded Form (ASI-X) and related these facets to a hierarchical model of latent symptoms of psychological distress. Results suggest that one facet of AS is associated with a broad General Distress factor underlying symptoms of most emotional disorders while others relate to intermediate-level and conceptually-meaningful narrow factors representing aspects of psychological distress specific to particular emotional disorders. 相似文献
997.
Ayers JW Hofstetter CR Irvin VL Song Y Park HR Paik HY Hovell MF 《Journal for the scientific study of religion》2010,49(3):536-549
This research examines the influence of messages from religious leaders and congregants on whether Korean women are overweight or obese. Data were drawn from telephone interviews with a probability sample (N = 591) of women of Korean descent living in California. Overweight or obese prevalence was measured using World Health Organization standards for Asians (BMI > 23). Respondents reported the frequency of messages discouraging “excessive eating” or encouraging “exercise” from religious leaders and congregants during a typical month. When conditioned on leaders’ messages, the frequency of congregants’ messages was associated with a significantly lower probability of being overweight or obese, although messages from either in the absence of the other were unassociated with being overweight or obese. At least for Korean women, religion may help prevent obesity via religious-based social mechanisms. 相似文献
998.
We compared what 160 U.S. judges, 57 law students, and 121 undergraduates know and believe about factors affecting the accuracy of eyewitness testimony. Judges were no more knowledgeable than were undergraduates, and both groups were less knowledgeable than were law students. For all 3 groups, increased knowledge of eyewitness factors was associated with beliefs that might reduce wrongful convictions. Participants in all 3 groups underestimated what potential jurors know about eyewitness testimony. The results suggest that increasing judges' knowledge of eyewitness testimony might help them to reduce wrongful convictions and to more accurately assess when eyewitness experts are needed. The results also suggest that law schools need to do a better job of educating law students about eyewitness testimony. 相似文献
999.
Russell Lang Tonya Davis Mark O'Reilly Wendy Machalicek Mandy Rispoli Jeff Sigafoos Giulio Lancioni April Regester 《Journal of applied behavior analysis》2010,43(1):113-118
The elopement of a child with Asperger syndrome was assessed using functional analyses and was treated in two school settings (classroom and resource room). Functional analyses indicated that elopement was maintained by access to attention in the resource room and obtaining a preferred activity in the classroom. Attention- and tangible-based interventions were compared in an alternating treatments design in both settings. Results validated the findings of the functional analyses. Implications for the assessment and treatment of elopement are discussed. 相似文献
1000.