全文获取类型
收费全文 | 33171篇 |
免费 | 985篇 |
国内免费 | 101篇 |
出版年
2020年 | 301篇 |
2019年 | 322篇 |
2018年 | 519篇 |
2017年 | 533篇 |
2016年 | 647篇 |
2015年 | 467篇 |
2014年 | 434篇 |
2013年 | 2210篇 |
2012年 | 1007篇 |
2011年 | 1030篇 |
2010年 | 533篇 |
2009年 | 529篇 |
2008年 | 771篇 |
2007年 | 710篇 |
2006年 | 658篇 |
2005年 | 1898篇 |
2004年 | 1199篇 |
2003年 | 967篇 |
2002年 | 692篇 |
2001年 | 833篇 |
2000年 | 804篇 |
1999年 | 572篇 |
1998年 | 282篇 |
1997年 | 275篇 |
1992年 | 538篇 |
1991年 | 534篇 |
1990年 | 536篇 |
1989年 | 527篇 |
1988年 | 477篇 |
1987年 | 477篇 |
1986年 | 496篇 |
1985年 | 532篇 |
1984年 | 456篇 |
1983年 | 419篇 |
1982年 | 293篇 |
1981年 | 340篇 |
1979年 | 478篇 |
1978年 | 335篇 |
1977年 | 304篇 |
1976年 | 296篇 |
1975年 | 439篇 |
1974年 | 496篇 |
1973年 | 515篇 |
1972年 | 434篇 |
1971年 | 430篇 |
1970年 | 399篇 |
1969年 | 430篇 |
1968年 | 515篇 |
1967年 | 501篇 |
1966年 | 473篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
112.
Cyd C. Strauss Cynthia A. Lease Cynthia G. Last Greta Francis 《Journal of abnormal child psychology》1988,16(4):433-443
Differences between a clinical sample of younger (ages 5 to 11) and older (ages 12 to 19) children meeting DSM-III criteria for overanxious disorder (OAD) were examined. Younger and older children were compared in terms of (1) the rates of OAD diagnoses occurring in the two age groups, (2) sociodemographic characteristics, (3) symptom expression, (4) association with other forms of maladjustment, and (5) self-reported anxiety and depression. The prevalence of OAD diagnoses and sociodemographic characteristics did not differ. Although younger and older OAD children showed similar rates of most specific DSM-III OAD symptoms, older children presented with a higher total number of overanxious symptoms than younger children. Older children more frequently exhibited a concurrent major depression or simple phobia, whereas younger OAD children more commonly had coexisting separation anxiety or attention deficit disorders. Older OAD children reported significantly higher levels of anxiety and depression on self-report measures. Findings indicated that the expression of OAD varies by developmental level. 相似文献
113.
Wistar rats of three age groups were tested in an automated tunnel-maze system of variable geometry to investigate whether changes in spontaneous locomotor activity and in learning and memory develop differentially or in a correlated fashion as a function of age. Senescent (30 months) as well as mature-adult (17 months) rats showed an age-correlated decline of locomotor activity as compared to the mature-young (5 months) group. Both working-memory (measured as within-trial arm discrimination performance) and reference-memory (measured as avoidance of "blind alley" visits) were severely affected in the senescent group, whereas the middle-aged animals suffered only from a working-memory deficit. The findings provide evidence that locomotor deficits do not necessarily interfere in the assessment of age-related changes in cognitive performance. Furthermore the results support the hypothesis that working and reference memory have different underlying physiological correlates and that these neuronal systems are differentially affected by the aging process. 相似文献
114.
L H Chiu 《The Journal of social psychology》1988,128(3):411-413
115.
Jeffrey S. Levin Ph.D. M.P.H. C. David Jenkins Ph.D. Robert M. Rose M. D. 《Journal of religion and health》1988,27(4):267-278
In a study of air traffic controllers, religious differences are found in the way Type A behavior is associated with several health status indicators. Associations between the Jenkins Activity Survey (JAS) and physical illness incidence, health-promotive behavior, diastolic and systolic blood pressure, subjective distress and impulse control problems, and alcohol consumption are examined by religious attendance, religious affiliation, and change in affiliation. Findings confirm that Type A does not vary significantly by religion. However, there are several significant findings between Type A and various health indicators. Type A is associated with illness incidence, overall and more strongly in several religion, subgroups. Type A and alcohol consumption are related positively in Protestants and converts, and negatively in churchgoing Catholics. Type A is related to impulse control problems in churchgoing Protestants and to subjective distress in churchgoing Catholics. Finally, in individuals with weak or no religious ties, Type A is associated with lower blood pressure. This last finding suggests that in some people (for example, the irreligious or unchurched), the coronary-prone behavior pattern may have cardiovascular effects which are salutary in at least one respect.The authors wish to thank Dr. Kyriakos S. Markides and Laura A. Ray for their assistance with this study. Address requests for reprints to Dr. Levin at the Institute of Gerontology, 300 North Ingalls, Ann Arbor, MI 48109. 相似文献
116.
117.
Y Nakajima 《Perceptual and motor skills》1988,66(3):872-874
Eyeblinking during autokinetic movement observed by one subject living in the up-down inverted visual world, was investigated. The subject wore frame-spectacles (without prisms) for the first two days and then wore up-down inverting spectacles (with prisms) for the next four days, followed by the resumption of the former frame-spectacles for one day. Eyeblinks during autokinetic movement were measured by using vertical EOG. Analysis showed (1) the occurrence of eyeblinking during autokinetic movement was not influenced by living in the up-down inverted visual world; (2) the frequency of eyeblinking during autokinetic movement significantly decreased with successive days of observation. 相似文献
118.
H. Newton Malony 《Pastoral Psychology》1988,36(3):164-168
This essay reports a program of research as the occupational and personal stress experienced by contemporary American clergy. Three studies are reported. In the first survey a group of largely Roman Catholic religious reported less stress than the general population. In a replication of this investigation on over 510 Protestant clergy this impression of less experienced stress and greater personal resources was confirmed. In the most recent study of clergy in Southern California, a mixed picture was observed. Although the impression of less overall stress was confirmed, great differences in layclery role expectations were observed.He is the coauthorof Clergy Malpractice: How to Care Carefully (Westminster Press, 1986) and is engaged in a variety of ministerial studies.Paper presented at the meeting of the International Council of Psychologists, Mexico City, September, 1984. 相似文献
119.
120.