首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   58595篇
  免费   2239篇
  国内免费   23篇
  2020年   603篇
  2019年   726篇
  2018年   1001篇
  2017年   1076篇
  2016年   1112篇
  2015年   773篇
  2014年   981篇
  2013年   4429篇
  2012年   1758篇
  2011年   1797篇
  2010年   1184篇
  2009年   1091篇
  2008年   1642篇
  2007年   1602篇
  2006年   1458篇
  2005年   1288篇
  2004年   1231篇
  2003年   1181篇
  2002年   1225篇
  2001年   1682篇
  2000年   1642篇
  1999年   1271篇
  1998年   600篇
  1997年   624篇
  1996年   579篇
  1995年   574篇
  1992年   1133篇
  1991年   1012篇
  1990年   1060篇
  1989年   950篇
  1988年   994篇
  1987年   947篇
  1986年   988篇
  1985年   922篇
  1984年   820篇
  1983年   769篇
  1979年   922篇
  1978年   679篇
  1977年   590篇
  1976年   584篇
  1975年   747篇
  1974年   857篇
  1973年   925篇
  1972年   694篇
  1971年   696篇
  1970年   636篇
  1969年   712篇
  1968年   843篇
  1967年   770篇
  1966年   713篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
771.
In the context of an annual fundraising drive for the American Society, two field experiments were conducted to test the relative effectiveness of suggesting either small or large contributions. In experiment 1, as part of a door-to-door campaign 300 people were randomly assigned to: (a) a standard request for contributions (control); (b) the standard request plus the words, “even a penny will help”; or (c) the standard request plus the words, “a generous contribution would really help.” As hypothesized, asking for a generous contribution significantly decreased the percentage of people who donated and failed to increase the average size of contribution by those who gave. Inconsistent with previous findings, the even-a-penny condition did not increase donating. In the second experiment conceptually similar requests were made in a mail-out campaign: 6,000 requests were made—2,000 suggested relatively small amounts (options beginning at $5); 2,000 suggested large amounts (options beginning at $5); and 2,000 were unspecified with regard to recommended amount (control). As expected, compared to the control condition, asking for small amounts increased the proportion of donors to nondonors without decreasing the average size of contributions, while asking for large amounts decreased the proportion of donors to nondonors without increasing the size of contributions. It is suggested that the findings have important implications for charitable fundraising.  相似文献   
772.
The development of generalized job initiative was examined with three severely retarded men working in an industrial assembly area of a sheltered workshop. Interventions included discrimination training, role-play training, and self-monitoring. For each participant, training was applied sequentially to three sets of job initiative behaviors. Intensive training was required to establish the first set of job initiative behaviors; however, the second and third sets of job initiative behaviors were learned with only discrimination training. The discussion summarizes the findings and suggests research needed to develop more powerful learning-to-learn paradigms.  相似文献   
773.
The present study examined the hypothesis that individuals are more influenced by a drug name than by the side effects associated with that drug when making recommendations regarding regulation. Subjects recommended the amount of regulation that should exist for eight drugs ranging from aspirin to LSD. One third of the subjects were asked to make recommendations based only on the drug name. Another third made recommendations based only on the facts associated with the drugs (i.e., side effects, symptoms). A final third made recommendations based on both facts and the drug name. Results indicated that, when given only the facts, subjects' recommendations deviated greatly from the actual regulation of the drugs but that the facts were ignored if subjects knew the name of the drug. These results suggest that critical information may be ignored when decisions are made about drug regulation. The implications for self-regulated drug use are discussed.  相似文献   
774.
To facilitate the classroom and workshop integration of three autistic clients, we examined the feasibility of teaching them to respond appropriately without the continual presence of specially trained treatment providers. Within a multiple baseline design, a 4-step treatment process was implemented to promote durable responsive performance. Results indicated that the therapist could be removed from the treatment environment and that appropriate behavior could be successfully maintained in community settings with only infrequent and delayed contingencies.  相似文献   
775.
776.
As part of a prospective, longitudinal study of suitability for and outcome of psychoanalysis, 22 patients were evaluated for changes in the level and quality of their object relations. These patients had been accepted for supervised analysis with candidates in training by senior analysts who had diagnosed them as neurotic. The majority of these patients reported difficulties in relationships as at least one of their reasons for originally seeking psychoanalytic treatment. Prior to beginning analysis, each patient was given a battery of psychological tests. One year after the termination of analysis, the test battery was readministered and a followup interview was conducted separately with each patient and analyst. Ratings of change based on patient and analyst interviews and comparisons of psychological tests before and after treatment all showed statistically significant improvement in the level and quality of object relations for this patient group. The results of this study support what is often observed in clinical practice, that psychoanalysis has a positive effect on the level and quality of a patient's object relations.  相似文献   
777.
L G Streetman 《Adolescence》1987,22(86):459-464
The self-esteem of 93 unmarried females between the ages of fourteen and nineteen was measured upon entry into several state-sponsored training programs. Some significant differences were discovered concerning the impact of early motherhood on these individuals. The symbolic importance of motherhood, as a passage into adult status, and the intervening effects of normative group anchorage may mediate between individuals' cognitive ability and their level of self-esteem.  相似文献   
778.
Histories of sexual abuse in adolescent male runaways   总被引:3,自引:0,他引:3  
In this study, data on sexual victimization in the histories of 89 Canadian male runaways as well as information on physical victimization, family structure, family financial stability, delinquent and criminal activities, and reasons for running away from home were evaluated. The population of male runaways evidenced dramatically higher rates of sexual and physical abuse than did randomly sampled populations. Sexually abused and nonsexually abused male runaways shared characteristics noted in the literature as common to runaways: problem families, high rates of delinquency, depression, tension, low self-image, and history of physical abuse. Sexually abused male runaways differed from nonsexually abused runaways in their reactions to their runaway event, with sexually abused male runaways responding in highly avoidant patterns coupled with extreme withdrawal from all types of interpersonal relationships. These differences are explained as consistent with known sequelae of sexual abuse, and the implications for treatment by runaway shelters and for further research are suggested.  相似文献   
779.
Handedness of hypothetically psychosis-prone subjects   总被引:1,自引:0,他引:1  
  相似文献   
780.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号