全文获取类型
收费全文 | 39734篇 |
免费 | 1477篇 |
国内免费 | 18篇 |
出版年
2020年 | 388篇 |
2019年 | 406篇 |
2018年 | 546篇 |
2017年 | 557篇 |
2016年 | 637篇 |
2015年 | 493篇 |
2014年 | 568篇 |
2013年 | 2829篇 |
2012年 | 1063篇 |
2011年 | 1045篇 |
2010年 | 692篇 |
2009年 | 679篇 |
2008年 | 963篇 |
2007年 | 937篇 |
2006年 | 832篇 |
2005年 | 812篇 |
2004年 | 735篇 |
2003年 | 696篇 |
2002年 | 742篇 |
2001年 | 1267篇 |
2000年 | 1248篇 |
1999年 | 883篇 |
1998年 | 401篇 |
1997年 | 384篇 |
1992年 | 791篇 |
1991年 | 754篇 |
1990年 | 775篇 |
1989年 | 727篇 |
1988年 | 669篇 |
1987年 | 669篇 |
1986年 | 681篇 |
1985年 | 714篇 |
1984年 | 623篇 |
1983年 | 556篇 |
1982年 | 414篇 |
1981年 | 435篇 |
1979年 | 628篇 |
1978年 | 480篇 |
1977年 | 415篇 |
1976年 | 396篇 |
1975年 | 583篇 |
1974年 | 672篇 |
1973年 | 694篇 |
1972年 | 573篇 |
1971年 | 557篇 |
1970年 | 512篇 |
1969年 | 550篇 |
1968年 | 679篇 |
1967年 | 652篇 |
1966年 | 590篇 |
排序方式: 共有10000条查询结果,搜索用时 125 毫秒
191.
We investigated longitudinally the effects of a stroke on the social support systems and well-being of the patient's primary support person, both acutely and as the condition stabilized. Individuals who had suffered a first stroke and a primary support person participated in two waves of data collection, carried out in 6-month intervals beginning 7 weeks after the stroke. Our data show that the prevalence of depressive symptoms is from 2 1/2 to 3 1/2 times higher than rates found among representative samples of middle-aged and elderly populations. Mean level of depression did not change over time, although level of optimism declined significantly. Multiple regression analyses showed that levels of depression and perceived burden in support persons are highly related to aspects of the stroke such as its severity, and that demographic variables such as age and income play a relatively minor role in attenuating these relations in the acute adjustment phase. However, from 7 to 9 months after the stroke, well-established demographic variables such as health, income, and age were significant predictors of depression. Individuals who were older and who had good health and higher incomes were least depressed. 相似文献
192.
Structural integration of the Affect Balance Scale and the Life Satisfaction Index A: race, sex, and age differences 总被引:1,自引:0,他引:1
In this research we examined race, sex, and age differences in the factorial structure of Liang's (1985) model of subjective well-being that integrates the Affect Balance Scale and the Life Satisfaction Index A. In particular, we viewed the covariance structure of the items as a function of several parameter matrices. We analyzed the factorial invariance by testing hypotheses involving the equivalence constraints of one or more parameter matrices with regard to the following: White and Black subsamples, men and women, and the young-old and the old-old. Data for the research came from the 1974 Harris National Council on Aging Survey, Myths and Reality of Aging in America. Analysis of covariance structures, or LISREL, was used to assess the factorial invariance. Replicated race differences were found in the factorial structure, but sex and age differences were not found. Consistent race differences were found for the second-order factor loadings for negative affect. 相似文献
193.
The belief is widely held that humor is related to recovery from, and perhaps an increased resistance to, coronary and other
stress-related diseases. Such generalizations do not typically distinguish between benign and hostile humor. In the present
research, the relationship between a measure of proneness to coronary heart disease (CHD) and appreciation of hostile and
nonhostile humor is examined. In two studies, one with college students and one with patients suffering from CHD, the relationship
between humor preferences and the coronary-prone (Type A) behavior pattern was examined. Each subject was given the Jenkins
Activity Survey as a measure of the coronary-prone personality type, and aggressive and nonaggressive jokes to rate for funniness.
Hostile humor was preferred to nonhostile humor by all groups, but among those suffering from CHD, those who could be classified
as “Type B’s” preferred nonhostile humor. The results indicate that those less prone to CHD appreciate both hostile and nonhostile
humor, while Type A’s seem to enjoy hostile humor only. 相似文献
194.
LAWRENCE H. GERSTEIN GREGORY A. BAYER 《Journal of counseling and development : JCD》1988,66(6):294-297
Braun, A.L., & Novak, D.E. (1986, November/December). A study of EAP non-utilization. EAP Digest, pp. 52–55. O'Connell, V. (1987, March/April). A strategy for overcoming supervisors' resistance. EAP Digest, pp. 63–66. Penzer, W.N. (1987, March/April). Toward sustaining quality mental health services. EAP Digest, pp. 35–40. 相似文献
195.
196.
197.
A software package called PAST (Programmer Assessment Software Tools) is described. PAST was designed as a research and diagnostic tool to analyze how programmers develop and test program code. PAST uses line changes between successive compiles to estimate a programmer’s cognitive processing. Line changes are highlighted and graphically presented between any two versions or compiles. Summary graphs and statistics across all versions also are provided. Applications of PAST for expanding our understanding of programming and applying it to research, teaching, and learning are discussed. 相似文献
198.
High-resolution CRT displays are subject togeometric distortion: lines that are straight in the internal coordinates of the graphics software and hardware are curved when projected onto a plane in the observer’s line of sight. As the available resolution of CRT screens increases, it becomes more difficult to measure and correct for this distortion. We present a simple, highly accurate method for determining the mapping between internal coordinates and the viewing plane. It requires that an observer, using a calibration program, adjust triples of displayed points until they are collinear. A metal straightedge placed between the observer and the screen aids in this judgment. We describe the calibration of an IBM Enhanced Graphics Display in high-resolution mode (350 × 640 pixels), and illustrate how to use the estimated mapping to choose internal coordinates to draw undistorted figures that are accurate to within 0.5 pixel. The method can be used to assess or to correct the accuracy of visual displays. The method is relevant to experiments in spatial vision, spatial perception, perception of dot patterns, and any application in which geometrically accurate stimuli are required. 相似文献
199.
P. Paul Heppner Ann H. Baumgardner Lisa M. Larson Richard E. Petty 《Counselling psychology quarterly》1988,1(2-3):129-143
This study examined the usefulness of an 8-week applied problem-solving training program. Specifically, the study examined (a) whether problem-solving training that emphasised self-management principles would be useful, (b) if the effects of training would persist over time, (c) whether an individual difference variable (problem-solving appraisal) would affect training outcomes, and (d) whether the cognitive responses of the subjects during the course of training were related to their problem-solving appraisal or the change process. Results indicated that problem solving training was effective at enhancing students’ problem-solving appraisal, and that the self-report changes were maintained at a 1 year follow-up. In particular, training seemed most useful for students who initially appraised their problem solving very negatively. Finally, the results suggested that the process-oriented cognitive responses were related to students' initial problem-solving self-appraisal as well as the impact of training. Implications of the results are discussed in terms of counselling interventions, problem solving training, the interpersonal influence process, and future research. 相似文献
200.