全文获取类型
收费全文 | 10720篇 |
免费 | 476篇 |
国内免费 | 5篇 |
专业分类
11201篇 |
出版年
2021年 | 110篇 |
2020年 | 181篇 |
2019年 | 172篇 |
2018年 | 271篇 |
2017年 | 279篇 |
2016年 | 310篇 |
2015年 | 221篇 |
2014年 | 283篇 |
2013年 | 1141篇 |
2012年 | 453篇 |
2011年 | 458篇 |
2010年 | 302篇 |
2009年 | 287篇 |
2008年 | 446篇 |
2007年 | 432篇 |
2006年 | 348篇 |
2005年 | 381篇 |
2004年 | 350篇 |
2003年 | 328篇 |
2002年 | 326篇 |
2001年 | 161篇 |
2000年 | 133篇 |
1999年 | 163篇 |
1998年 | 165篇 |
1997年 | 146篇 |
1996年 | 129篇 |
1995年 | 120篇 |
1994年 | 119篇 |
1993年 | 104篇 |
1992年 | 140篇 |
1991年 | 104篇 |
1990年 | 104篇 |
1989年 | 89篇 |
1988年 | 89篇 |
1987年 | 89篇 |
1986年 | 105篇 |
1985年 | 109篇 |
1984年 | 120篇 |
1983年 | 110篇 |
1982年 | 101篇 |
1981年 | 122篇 |
1980年 | 117篇 |
1979年 | 101篇 |
1978年 | 114篇 |
1977年 | 121篇 |
1976年 | 114篇 |
1975年 | 110篇 |
1974年 | 105篇 |
1973年 | 93篇 |
1968年 | 79篇 |
排序方式: 共有10000条查询结果,搜索用时 7 毫秒
51.
The Additive Factor Method: A differential diagnostic tool in hyperactivity and learning disability 总被引:1,自引:0,他引:1
Jaap van der Meere Maarten van Baal Joseph Sergeant 《Journal of abnormal child psychology》1989,17(4):409-422
The Additive Factor Method assumes that task performance is the sum of sequential and independent processes. We studied the duration of the central processes (memory search and decision) and the motor decision process in hyperactive and learning-disabled children under socalled divided attention and S-R compatibility conditions. It was found that the learning-disabled were impaired in memory search and decision processes whereas hyperactives were impaired in the motor decision process.The authors wish to thank L. Leertouwer for making the drawings. 相似文献
52.
Two groups of singers (n = 12,13) and a group of nonsingers (n = 12) each produced the national anthem by (1) speaking and (2) singing the words and by (3) humming the melody. Regional cerebral blood flow (rCBF) was measured at rest and during each phonation task from seven areas in each hemisphere by the 133Xe-inhalation method. Intrahemisphere, interhemisphere, and global rCBF were generally similar across phonation tasks and did not yield appreciable differences among the nonsingers and the singers. 相似文献
53.
Audrey Thomas McCluskey 《Sex roles》1989,21(1-2):113-126
Traditional definitions of feminism do not hold for some black women like Mary McLeod Bethune who had to overcome the dual burdens of race and sex in order to build a school for black girls in the racially tense South during the early part of the 20th century. Ever a pragmatist, Bethune seized the opportunity offered by the rhetoric of domesticity and certain stereotypical views of blacks in order to advance the higher cause of uplift and self-sufficiency for black women through education. 相似文献
54.
HyperCard (Atkinson, 1987) is a new development environment for the Macintosh that shows promise for use in psychological research and testing. In this paper, we discuss the development of HyperCard stackware with which a block-design task similar to that of the Wechsler Adult Intelligence Scale-Revised (WAIS-R) can be administered. The reliability and validity of the computerized block-design task was evaluated by administering both the computerized task and the WAIS-R subtest to college undergraduates. Results indicated that the computerized task’s reliability compared favorably with that of the WAIS-R subtest. Validity coefficients were equivocal; although an elapsed-time measure showed moderate correlation between the tasks, the numbers of designs correctly completed in each condition were not significantly correlated. 相似文献
55.
Edmond A. Murphy Kenneth R. Berger Joseph E. Trojak E. Manuel Rosell 《Theoretical medicine and bioethics》1989,10(4):355-365
Some properties are discussed of regular polygons that may result from angular homeostatic processes in stable orbit. To characterize these homeostatic polygons we need to discuss the winding number, the sidedness (integer, fractional and irrational), multiplicity, envelopes, and density. A regular (i.e., equilateral, equiangular) polygon may be closed in one revolution about its unique center, in multiple revolutions, or not at all. A homeostatic polygon can be generated only if all vertices are included in a single polygon, which occurs if and only if the number of vertices and the number of revolutions required to complete the polygon are relatively prime. For the homeostatic polygon to have a finite number of sides (without repeating itself) the angle subtended by any two successive vertices at the center must be a rational multiple of 2. Biological implications of these properties are illustrated. 相似文献
56.
Jerry M. Lewis J. M. Rabbie Thomas Berg Michael Argyle Karin Aronsson Roger Ingham Neil Frude A. M. Munton Duncan Cramer John Shotter Ray Holland Nobleza Asuncion-Lande Ray Crozier Candida Peterson Chris Spencer Victor J. Callan Jack Martin N. L. Reinsch Anthony Ryle David Canter Jill Robson H. R. Beech Duncan Moss David Fontana Tom Richards 《Current psychology (New Brunswick, N.J.)》1989,8(1):49-87
57.
Marilyn Likins Charles L. Salzberg Joseph J. Stowitschek Ben Lignugaris/Kraft Rita Curl 《Journal of applied behavior analysis》1989,22(4):381-393
In two studies, co-workers of persons with disabilities were taught to use coincidental training procedures while completing their own jobs. In Study 1, the effects of coincidental training on the salad-making skills of 3 trainees with mild and moderate mental retardation were evaluated. Coincidental training by co-workers resulted in improved accuracy of the salad-making skills of the trainees. In Study 2, trainees were also coincidentally taught to make quality-control checks of their salads. An alternating treatments and multiple baseline design indicated that the trainees more readily acquired the skills when taught to check the correctness of their work. 相似文献
58.
Thomas T. Hewett 《Behavior research methods》1985,17(2):339-344
An electronic spreadsheet simulator can be used to enable students to conduct simulated microelectrode recording experiments. In addition, it can be used both to let students explore the operation of models of hypothetical neural networks and to let them design and develop their own neural models. 相似文献
59.
The present study examined the effects of the sex of the leader, the sex of the rater, and the temporal position of leader performance information on ratings of leader behavior. Male and female subjects listened to an audiotape of a male or female leader and then rated the leader's initiating structure and consideration behaviors. The position of the leader performance information was manipulated by describing the leader as successful before or after raters listened to the audiotape or not presenting raters with the performance information. Analyses indicated that the sex of the leader and/or sex of the rater biased ratings of initiating structure when the performance information was presented after the audiotape and when no leader performance information was presented. Consideration ratings were affected only by the position of the leader performance information. The results are interpreted within a cognitive/implicit sex theory framework. Implications for leadership research are also discussed.Portions of the data analyzed in this study were collected by the second author as part of a master's thesis directed by Joseph A. Sgro. 相似文献
60.