全文获取类型
收费全文 | 104801篇 |
免费 | 1979篇 |
国内免费 | 6篇 |
专业分类
106786篇 |
出版年
2020年 | 1213篇 |
2019年 | 1568篇 |
2018年 | 1869篇 |
2017年 | 1898篇 |
2016年 | 2207篇 |
2015年 | 1607篇 |
2014年 | 1711篇 |
2013年 | 8173篇 |
2012年 | 3088篇 |
2011年 | 3364篇 |
2010年 | 2095篇 |
2009年 | 2067篇 |
2008年 | 3028篇 |
2007年 | 3007篇 |
2006年 | 2715篇 |
2005年 | 2424篇 |
2004年 | 2322篇 |
2003年 | 2157篇 |
2002年 | 2277篇 |
2001年 | 3226篇 |
2000年 | 3090篇 |
1999年 | 2374篇 |
1998年 | 1246篇 |
1997年 | 1110篇 |
1996年 | 1049篇 |
1995年 | 980篇 |
1993年 | 991篇 |
1992年 | 1979篇 |
1991年 | 1874篇 |
1990年 | 1818篇 |
1989年 | 1655篇 |
1988年 | 1634篇 |
1987年 | 1579篇 |
1986年 | 1649篇 |
1985年 | 1706篇 |
1984年 | 1425篇 |
1983年 | 1249篇 |
1982年 | 963篇 |
1979年 | 1452篇 |
1978年 | 1080篇 |
1975年 | 1238篇 |
1974年 | 1308篇 |
1973年 | 1396篇 |
1972年 | 1211篇 |
1971年 | 1093篇 |
1970年 | 978篇 |
1969年 | 1004篇 |
1968年 | 1280篇 |
1967年 | 1184篇 |
1966年 | 1023篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
821.
The study attempted to isolate some of the environmental conditions that controlled the self-destructive behavior of three severely retarded and psychotic children. In the extinction study subjects were placed in a room where they were allowed to hurt themselves, isolated from interpersonal contact. They eventually ceased to hurt themselves in that situation, the rate of self-destruction falling gradually over successive days. In the punishment study, subjects were administered painful electric shock contingent on the self-destructive behavior. (1) The self-destructive behavior was immediately suppressed. (2) The behavior recurred when shock was removed. (3) The suppression was selective, both across physical locales and interpersonal situations, as a function of the presence of shock. (4) Generalized effects on other, non-shock behaviors, appeared in a clinically desirable direction. Finally, a study was reported where self-destructive behavior increased when certain social attentions were given contingent upon that behavior. 相似文献
822.
Donald J. Searls Alan L. Sternberg Lowell T. Wilson R. W. Miskimins 《Journal of Employment Counseling》1969,6(1):22-26
The experiences of the placement department of the Mental Health and Manpower Project have demonstrated that an effective team can be created to develop job opportunities for the mentally restored psychiatric patient. Composed of a vocational counselor and a placement counselor, the team is effective in securing meaningful employment and developing re-education programs in the community. While the vocational counselor provides the clinical information concerning the restored patient-client, the placement counselor serves as a more personnel oriented individual in finding the appropriate kind of employment position. The team points to the potential that the mental health center possesses in involving the general community in its programs. 相似文献
823.
Control of responding by the elements of a compound discriminative stimulus and by the elements as individual discriminative stimuli
下载免费PDF全文

Birkimer JC 《Journal of the experimental analysis of behavior》1969,12(3):431-436
In the first of two studies, the responding of four albino rats was differentially reinforced in the presence of noise and light together and then tested in the presence of the noise and the light separately during extinction. The light exercised substantially more control of responding than did the noise. In the second study the responding of a similar group of four rats was differentially reinforced in the presence of the noise and the light separately. Control of responding by the light developed more rapidly than control by the noise. Results suggest that levels of control by stimuli after differential reinforcement with respect to the stimuli together can be predicted by the rates of development of control during differential reinforcement with respect to the stimuli separately. 相似文献
824.
825.
826.
827.
828.
829.
E. J. Fjerdincstad 《Scandinavian journal of psychology》1969,10(1):220-224
F jerdingstad , E. J. Chemical transfer of alternation training in the Skinner box. Scand. J. Psychol ., 1969, 10 , 220–224.—In six individual experiments one group of recipient mice was injected with brain extract from rat donors trained to alternate between bars in a Skinner box; another group was injected with extract from donors reinforced for pressing either bar irrespective of choice. During testing the recipients of 'alternation extract' showed a significantly higher tendency to alternate. 相似文献
830.
K onttinen , R. & K arila , A. Intentional communication in the tree drawing test. Scand. J. Psychol ., 1969, 10 , 129–136—One way in which relationships between drawing variables and personality traits may be conceived is by interpreting the drawing as intentional communication. Some implications of this proposition were tested. Five formal variables of tree drawings were studied: angularity, size, form level, shading, and pressure. Only angularity can unambiguously be given a communication interpretation; but the other variables, too, may perhaps be used for intentional communication. 相似文献