全文获取类型
收费全文 | 7680篇 |
免费 | 511篇 |
国内免费 | 2篇 |
专业分类
8193篇 |
出版年
2023年 | 92篇 |
2022年 | 49篇 |
2021年 | 74篇 |
2020年 | 215篇 |
2019年 | 206篇 |
2018年 | 220篇 |
2017年 | 303篇 |
2016年 | 288篇 |
2015年 | 250篇 |
2014年 | 262篇 |
2013年 | 1043篇 |
2012年 | 367篇 |
2011年 | 367篇 |
2010年 | 270篇 |
2009年 | 290篇 |
2008年 | 326篇 |
2007年 | 300篇 |
2006年 | 264篇 |
2005年 | 221篇 |
2004年 | 206篇 |
2003年 | 209篇 |
2002年 | 186篇 |
2001年 | 93篇 |
2000年 | 82篇 |
1999年 | 78篇 |
1998年 | 87篇 |
1997年 | 71篇 |
1996年 | 107篇 |
1995年 | 82篇 |
1994年 | 87篇 |
1993年 | 76篇 |
1992年 | 86篇 |
1991年 | 86篇 |
1990年 | 86篇 |
1989年 | 50篇 |
1988年 | 60篇 |
1987年 | 52篇 |
1986年 | 51篇 |
1985年 | 54篇 |
1984年 | 56篇 |
1982年 | 64篇 |
1981年 | 49篇 |
1980年 | 66篇 |
1979年 | 65篇 |
1978年 | 65篇 |
1977年 | 76篇 |
1976年 | 46篇 |
1975年 | 43篇 |
1974年 | 36篇 |
1973年 | 42篇 |
排序方式: 共有8193条查询结果,搜索用时 0 毫秒
31.
Walter Schneider 《Behavior research methods》1989,21(2):334-340
A computer virus is a program that replicates itself and spreads to computers with the goal of disrupting or destroying normal computer use. In academic computing, viruses represent a serious problem that costs millions of dollars in losses annually and hinders the free exchange of information so critical to education. Viruses operate in incubation, infection, and destroy phases. The nature, mechanisms, and preventive measures for personal-computer viruses are reviewed. Different procedures are recommended to protect research laboratories, instructional laboratories, and software lending libraries. Tradeoffs between providing adequate protection and not having the security become too burdensome are considered. 相似文献
32.
John M. Eiler Walter W. Nelson Craig C. Jensen Steven P. Johnson 《Behavior research methods》1989,21(1):53-58
Using bar code technology to automate data collection provides a rapid and reliable alternative to paper-and-pencil tracking or keyboard entry into pocket or laptop computer. An array of bar code symbols is printed on a data menu, with a unique symbol corresponding to each possible observation. Bar code symbols are scanned using hand-held readers, which record the event, log the observation time, and store data for transfer to a personal computer. Advantages of the bar code monitoring system include: (1) ease of use by staff with minimal technical training, (2) reduced data entry errors and increased entry speed, (3) reliable portable operation, and (4) low-cost hardware. While the bar code system described here is used for behavioral monitoring in a residential treatment setting for the developmentally disabled, with minimal modification this system can be adapted for use in a wide variety of research and clinical applications. 相似文献
33.
Daniel J Brass 《Organizational behavior and human decision processes》1985,35(2):216-240
This research investigated the relationships between technology, interdependence, job characteristics, and employee satisfaction, performance, and influence. Technology was operationalized at the individual level of analysis to include the dimensions of input uncertainty, conversion uncertainty, and output uncertainty. Pooled, sequential, and reciprocal interdependence was assessed. The results indicated that input and conversion uncertainty and interdependence were strongly related to such job characteristics as autonomy, skill variety, task identity, task significance, and task feedback. While the job characteristics related positively to employee satisfaction, input and conversion uncertainty related negatively to satisfaction, thus creating a mutual suppression effect. Although the uncertainty dimensions did not relate significantly to performance, there is some evidence that this negative relationship was being suppressed by the positive relationship between job characteristics and performance. Both the job characteristics and the technology dimensions related positively to influence. Results were discussed in terms of appropriate matches between technology and job characteristics. 相似文献
34.
Hardyck, Tzeng, and Wang (1978, Brain and Language, 5, 56–71) hypothesized that ample repetition of a small number of stimuli is required in order to obtain VHF differences in tachistoscopic tasks. Four experiments, with varied levels of repetition, were conducted to test this hypothesis. Three experiments utilized the general task of object-picture naming and one utilized a word-naming task. Naming latencies constituted the dependent measure. The results demonstrate that for the object-naming paradigm repetition is required for RVF superiority to emerge. Repetition was found to be unnecessary for RVF superiority in the word-naming paradigm, with repetition actually reducing RVF superiority. Experiment I suggested the possibility that RVF superiority developed for the second half of the trials as a function of practice or hemispheric activation, regardless of repetition level. Subsequent experiments, better designed to assess this possibility, clearly refuted it. It was concluded that the effect of repetition depends on the processing requirements of the task. We propose that, for tasks which can be processed efficiently by one hemisphere, the effect of repetition will be to reduce VHF asymmetries; but tasks requiring substantial processing by both hemispheres will show shifts to RVF superiority as a function of repetition. 相似文献
35.
36.
Daniel L. Dolgin Ph.D. Albertino Salazar A.C.S.W. Salvadore Cruz M.D. 《Journal of Contemporary Psychotherapy》1987,17(4):285-299
The Hispanic Treatment Program was an inpatient psychotherapy Unit at the Colorado State Hospital that operated from October 1979 to February 1982. Staffed exclusively with personnel of Hispanic heritage, the Program emphasized the use of linguistic and cultural elements, as well as the customs and beliefs characteristic of Hispanic culture. A specialized inpatient treatment unit for Hispanic patients with psychotic (especially, schizophrenia) disturbances, the Program offered a unique opportunity to these patients by providing a variety of psychotherapies conducted in a culturally-sensitive manner. Spanish and English were used in a manner conducive to enhancing the treatment process, with flexibility in use of language.This project was supported by Grant No. ROlMH29016-01A2, awarded by the National Institute of Mental Health, Center for Minority Group Mental Health.The authors acknowledge Gregorio Kort, M.D. and Wayne Smyer, M.A. and other staff for their contributions to the development and success of the Hispanic Treatment Program.Original version of paper was selected for the First Senior Award given by the Psychological Services Center's (NYSCP) Minority Mental Health Award Competition. 相似文献
37.
Ernest N. Jouriles Julian Barling K. Daniel O'Leary 《Journal of abnormal child psychology》1987,15(2):165-173
Previous research indicates that children from violent marriages are more likely to suffer from conduct problems and/or anxiety disorders than children from nonviolent, satisfactory marriages. However, knowledge regarding specific factors present in violent marriages relating to child problems is limited. The present study examined the relationships involving interspousal aggression, parent-child aggression, and child behavior problems in a sample of 45 children from maritally violent families. Mothers indicated how often their children witnessed interspousal aggression and were victims of parent-child aggression. Mothers also rated their children's problem behaviors while children reported on their own depressive symptoms. The witnessing of interspousal aggression was highly associated with parental aggression directed toward children. Parent-child aggression related to attention problems, anxiety-withdrawl, motor excess, and conduct problems in children. However, the witnessing of interspousal aggression was not significantly related to child behavior problems. These results are consistent with theoretical predictions linking marital problems to child behavior by virtue of their association with parenting.This research was supported in part by a Grant-in-Aid of Research awarded to the first author by Sigma Xi, the Scientific Research Society, and NIMH Grant No. MH35340 awarded to the third author. The authors wish to thank Martha Wray and her staff at VIBS for their help throughout this project. 相似文献
38.
39.
Augustus Y. Napier PhD 《Contemporary Family Therapy》1987,9(1-2):42-57
This is the second of two papers dealing with symbolic-experiential treatment of marital issues. The first—Early Stages in Experiential Marital Therapy — discussed three early stages. This paper discusses regressive work with couples, including engagement with the family of origin. 相似文献
40.
Israel W. Charny PhD 《Contemporary Family Therapy》1987,9(3):163-180
This paper describes three types of traps or collusive marital agreements-incompetence traps, complementarity traps, and success traps-in which the mates renounce or forgo competent functioning in vital areas of marital roles and experience. It is suggested that responsible clinical work with the couple should include a careful evaluation of such traps and the potential breakdown or dysfunction inherent in each one, and a decision as to whether or not to attempt therapeutic penetration into such collusive agreements even before the couple complain directly about their arrangement. 相似文献