全文获取类型
收费全文 | 81486篇 |
免费 | 3158篇 |
国内免费 | 38篇 |
专业分类
84682篇 |
出版年
2020年 | 839篇 |
2019年 | 1039篇 |
2018年 | 1507篇 |
2017年 | 1462篇 |
2016年 | 1581篇 |
2015年 | 1080篇 |
2014年 | 1330篇 |
2013年 | 7410篇 |
2012年 | 2335篇 |
2011年 | 2514篇 |
2010年 | 1525篇 |
2009年 | 1509篇 |
2008年 | 2328篇 |
2007年 | 2225篇 |
2006年 | 1998篇 |
2005年 | 1773篇 |
2004年 | 1729篇 |
2003年 | 1651篇 |
2002年 | 1649篇 |
2001年 | 2583篇 |
2000年 | 2495篇 |
1999年 | 1900篇 |
1998年 | 972篇 |
1997年 | 865篇 |
1996年 | 918篇 |
1995年 | 891篇 |
1994年 | 866篇 |
1993年 | 861篇 |
1992年 | 1699篇 |
1991年 | 1572篇 |
1990年 | 1563篇 |
1989年 | 1381篇 |
1988年 | 1368篇 |
1987年 | 1351篇 |
1986年 | 1363篇 |
1985年 | 1399篇 |
1984年 | 1174篇 |
1983年 | 988篇 |
1982年 | 799篇 |
1979年 | 1122篇 |
1978年 | 841篇 |
1975年 | 1033篇 |
1974年 | 1038篇 |
1973年 | 1095篇 |
1972年 | 1001篇 |
1971年 | 895篇 |
1970年 | 796篇 |
1968年 | 993篇 |
1967年 | 918篇 |
1966年 | 840篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
Elizabeth J. Robinson Stephen A. Butterfill Erika Nurmsoo 《The British journal of developmental psychology》2011,29(4):961-980
In five experiments, we examined 3‐ to 6‐year‐olds’ understanding that they could gain knowledge indirectly from someone who had seen something they had not. Consistent with previous research, children judged that an informant, who had seen inside a box, knew its contents. Similarly, when an informant marked a picture to indicate her suggestion as to the content of the box, 3‐ to 4‐year‐olds trusted this more frequently when the informant had seen inside the box than when she had not. Going beyond previous research, 3‐ to 4‐year‐olds were also sensitive to informants’ relevant experience when they had to look over a barrier to see the marked picture, or ask for the barrier to be raised. Yet when children had to elicit the informant's suggestion, rather than just consult a suggestion already present, even 4‐ to 5‐year‐olds were no more likely to do so when the informant had seen the box's content than when she had not, and no more likely to trust the well‐informed suggestion than the uninformed one. We conclude that young children who can ask questions may not yet fully understand the process by which they can gain accurate information from someone who has the experience they lack. 相似文献
62.
Kathleen Forcier Laura R Stroud George D Papandonatos Brian Hitsman Meredith Reiches Jenelle Krishnamoorthy Raymond Niaura 《Health psychology》2006,25(6):723-739
A meta-analysis of published studies with adult human participants was conducted to evaluate whether physical fitness attenuates cardiovascular reactivity and improves recovery from acute psychological stressors. Thirty-three studies met selection criteria; 18 were included in recovery analyses. Effect sizes and moderator influences were calculated by using meta-analysis software. A fixed effects model was fit initially; however, between-studies heterogeneity could not be explained even after inclusion of moderators. Therefore, to account for residual heterogeneity, a random effects model was estimated. Under this model, fit individuals showed significantly attenuated heart rate and systolic blood pressure reactivity and a trend toward attenuated diastolic blood pressure reactivity. Fit individuals also showed faster heart rate recovery, but there were no significant differences in systolic blood pressure or diastolic blood pressure recovery. No significant moderators emerged. Results have important implications for elucidating mechanisms underlying effects of fitness on cardiovascular disease and suggest that fitness may be an important confound in studies of stress reactivity. 相似文献
63.
64.
Lesley Bonner Mike A. Burton 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》2004,57(6):1019-1029
Adults are better at recognizing familiar faces from the internal facial features (eyes, nose, mouth) than from the external facial features (hair, face outline). However, previous research suggests that this “internal advantage” does not appear until relatively late in childhood, and some studies suggest that children rely on external features to recognize all faces, whether familiar or not. We use a matching task to examine face processing in 7-8- and 10-11-year-old children. We use a design in which all face stimuli can be used as familiar items (for participants who are classmates) and unfamiliar items (for participants from a different school). Using this design, we find an internal feature advantage for matching familiar faces, for both groups of children. The same children were then shown the external and internal features of their classmates and were asked to name or otherwise identify them. Again, both age groups identified more of their classmates correctly from the internal than the external features. This is the first time an internal advantage has been reported in this age group. Results suggest that children as young as 7 process faces in the same way as do adults, and that once procedural difficulties are overcome, the standard effects of familiarity are observed. 相似文献
65.
66.
T. J. Roper R. A. Boakes 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1981,33(2):137-140
TOATES, F. Animal Behaviour: A Systems Approach. Chichester: John Wiley and Sons. 1980. Pp. 299. Hardback £17. Paper back £6.40 ISBN 0 471 27724.
DICKINSON, A. Contemporary Animal Learning Theory. Cambridge: University Press. 1980. Pp. 177. Hardback £12.50. Paperback £3.95. ISBN 0 521 23469 7. 相似文献
DICKINSON, A. Contemporary Animal Learning Theory. Cambridge: University Press. 1980. Pp. 177. Hardback £12.50. Paperback £3.95. ISBN 0 521 23469 7. 相似文献
67.
68.
George F. Parker M.D. 《Behavioral sciences & the law》2015,33(2-3):308-322
Indiana statute allows police to seize firearms without a warrant if the officer believes a person meets the law's definition of “dangerous.” Review of the use of this law in Marion County (Indianapolis), Indiana, showed that prosecutors filed petitions in court to retain weapons seized by police under this law 404 times between 2006 and 2013. Police removed weapons from people due to identification of a risk of suicide (68%) or violence (21%), or the presence of psychosis (16%). The firearm seizures occurred in the context of domestic disputes in 28% of cases and intoxication was noted in 26% of cases. There were significant demographic differences in the circumstances of firearm seizures and the firearms seized. The seized firearms were retained by the court at the initial hearing in 63% of cases; this retention was closely linked to the defendant's failure to appear at the hearing. The court dismissed 29% of cases at the initial hearing, closely linked to the defendant's presence at the hearing. In subsequent hearings of cases not dismissed, the court ordered the destruction of the firearms in 72% of cases, all when the individual did not appear in court, and dismissed 24% of the cases, all when the individual was present at the hearing. Overall, the Indiana law removed weapons from a small number of people, most of whom did not seek return of their weapons. The firearm seizure law thus functioned as a months-long cooling-off period for those who did seek the return of their guns. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
69.
70.
Informed by theory and research on attributions and narrative persuasion, we compared the effectiveness of narrative and nonnarrative messages in changing attributions of responsibility for causes and solutions related to obesity in the United States. We randomly assigned 500 adults to view one of three messages (narrative, evidence, and a hybrid of the two) emphasizing environmental causes of obesity, or a no‐exposure control condition. The narrative condition increased the belief that societal actors (government, employers) are responsible for addressing obesity, but only among liberals. This pattern of results was partially explained by the success of the narrative condition in reducing reactive counterarguing, relative to the evidence condition, among liberals. We conclude with theoretical and practical implications. 相似文献