全文获取类型
收费全文 | 45668篇 |
免费 | 1871篇 |
国内免费 | 15篇 |
出版年
2020年 | 491篇 |
2019年 | 544篇 |
2018年 | 746篇 |
2017年 | 765篇 |
2016年 | 864篇 |
2015年 | 654篇 |
2014年 | 744篇 |
2013年 | 3264篇 |
2012年 | 1400篇 |
2011年 | 1378篇 |
2010年 | 898篇 |
2009年 | 842篇 |
2008年 | 1236篇 |
2007年 | 1225篇 |
2006年 | 1076篇 |
2005年 | 1047篇 |
2004年 | 986篇 |
2003年 | 904篇 |
2002年 | 924篇 |
2001年 | 1378篇 |
2000年 | 1303篇 |
1999年 | 1000篇 |
1998年 | 503篇 |
1997年 | 444篇 |
1996年 | 430篇 |
1992年 | 944篇 |
1991年 | 866篇 |
1990年 | 880篇 |
1989年 | 756篇 |
1988年 | 760篇 |
1987年 | 736篇 |
1986年 | 770篇 |
1985年 | 851篇 |
1984年 | 653篇 |
1983年 | 615篇 |
1981年 | 431篇 |
1979年 | 738篇 |
1978年 | 490篇 |
1977年 | 482篇 |
1976年 | 467篇 |
1975年 | 633篇 |
1974年 | 723篇 |
1973年 | 751篇 |
1972年 | 635篇 |
1971年 | 602篇 |
1970年 | 598篇 |
1969年 | 585篇 |
1968年 | 779篇 |
1967年 | 682篇 |
1966年 | 626篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
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
52.
53.
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
54.
RENNEKER R 《The Psychoanalytic quarterly》1952,21(4):528-536
55.
Although a great deal of research has been conducted on the relationship between social support and physical health, the contribution of personality characteristics to this relationship has rarely been assessed. Structural equation modeling was employed to derive and test a model of the direct and indirect relationships between personality characteristics, social network size, the perceived availability of support, socially supportive behaviors, and perceived physical health with a sample of Pennsylvania adults. Significant paths indicate that individuals who perceive themselves as affiliative and as help seekers and help givers report larger social networks, receive more socially supportive behaviors, and perceive that more support is available to them. The perception that support is available shared a direct relationship with perceived physical health. The utility of including multiple measures of social support and personality characteristics related to receiving support in investigations of the relationship between social support and physical health is discussed. 相似文献
56.
57.
58.
Three experiments examined the relationships among plan complexity, access to planned actions, and verbal fluency while pursuing a persuasion goal. Consistent with theoretical expectations, complex planners were less fluent than less complex planners under high access conditions. Persons whose access was raised were less fluent than those whose access was not raised. A second experiment showed that reduced fluency was not induced by lowering of self-confidence. The third experiment replicated the findings of the second experiment and demonstrated that the questioning procedure used to raise access in the first two experiments produced increases in plan complexity as suggested by theory. These findings are discussed in terms of their implications for the study of strategic communication. 相似文献
59.
60.