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   35656篇
  免费   1527篇
  国内免费   19篇
  37202篇
  2020年   402篇
  2019年   400篇
  2018年   657篇
  2017年   573篇
  2016年   640篇
  2015年   445篇
  2014年   604篇
  2013年   2567篇
  2012年   1055篇
  2011年   1083篇
  2010年   640篇
  2009年   696篇
  2008年   960篇
  2007年   980篇
  2006年   876篇
  2005年   806篇
  2004年   741篇
  2003年   691篇
  2002年   684篇
  2001年   1375篇
  2000年   1346篇
  1999年   988篇
  1998年   397篇
  1997年   368篇
  1996年   342篇
  1992年   794篇
  1991年   720篇
  1990年   809篇
  1989年   673篇
  1988年   640篇
  1987年   606篇
  1986年   616篇
  1985年   675篇
  1984年   548篇
  1983年   470篇
  1982年   369篇
  1979年   519篇
  1978年   416篇
  1977年   340篇
  1976年   317篇
  1975年   471篇
  1974年   542篇
  1973年   555篇
  1972年   445篇
  1971年   410篇
  1970年   340篇
  1969年   386篇
  1968年   481篇
  1967年   428篇
  1966年   422篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
961.
This paper describes a model for group analytic psychotherapy with patients who have been psychotic, namely, schizophrenics and manic depressives. The groups are run on the group centered principles of S. H. Foulkes. They are continuous, slow-open groups, in line with these patients' needs for long-term therapy. A theory is proposed which justifies treating these patients in group-centered groups despite their great dependency needs. The paper also describes the task of the therapist in building and running such a group.Acknowledgments to Geoffrey Elkan, Marcia Levene, Noa Rotem, Aya Levi-Posnanski, Yossi Ezrati, S. Littman, Tamar Sternberg, E. Danilowitz, and C. Kauffman.  相似文献   
962.
T. L. Brink 《Zygon》1993,28(2):283-286
Abstract. This paper is on Ward Goodenough's recent article (27: 3), suggesting that his points can be clarified by reiterating the distinction between the realms of meaning and relevance. Religion's "truth" is in the form of its ualue; the "proof" which it requires is uindication; and the resulting "faith" must be understood as commitment.  相似文献   
963.
The current study tests for the presence of differential order effects in evaluation tasks with consistent and inconsistent evidence as predicted by the Hogarth and Einhorn (1992) belief-adjustment model. The results, based on both between-subjects and within-subjects experiments, demonstrate that there were significant recency effects with inconsistent evidence as predicted, larger recency effects when the inconsistent evidence was farther apart in subjective value as predicted, and significant recency effects even when subjects were given training designed to both help them understand the task as completely as possible and to be better able to assess the pieces of evidence. By including a within-subjects design, we were able to demonstrate that the difference in subjective value between two pieces of evidence is the primary factor influencing the magnitude of the recency effect, regardless of whether the evidence is consistent or inconsistent. This latter finding is unique and contrary to previous research and theory.  相似文献   
964.
Despite the importance of probability assessment methods in behavioral decision theory and decision analysis, little attention has been directed at evaluating their reliability and validity. In fact, no comprehensive study of reliability has been undertaken. Since reliability is a necessary condition for validity, this oversight is significant. The present study was motivated by that oversight. We investigated the reliability of probability measures derived from three response modes: numerical probabilities, pie diagrams, and odds. Unlike previous studies, the experiment was designed to distinguish systematic deviations in probability judgments, such as those due to experience or practice, from random deviations. It was found that subjects assessed probabilities reliably for all three assessment methods regardless of the reliability measures employed. However, a small but statistically significant decrease over time in the magnitudes of assessed probabilities was observed. This effect was linked to a decrease in subjects overconfidence during the course of the experiment.  相似文献   
965.
The arguments against doctors as "double agents" that are presented by Marcia Angell in the preceding article do not defeat the core justification for rationing some relatively high-expense, low-benefit care, and they do not enable us to conclude that clinicians should be barred from any active, substantive role in decisions to limit that care. They do, however, reveal several important conditions that need to govern cost-conscious medial practice in order to preserve an ethic of fidelity to patients: insurers' profits and providers' incomes must be fair, providers must inform patients of any economic reasons that lead to the foregoing of care, and "direct incentive" arrangements must not be used to contain costs.  相似文献   
966.
This article describes an important new area of research on services for children and adolescents with mental disorders at the National Institute of Mental Health, the parameters of mental health services research for youth, and the opportunities that are available for grant-funded investigations in this area.  相似文献   
967.
To determine the frequency and correlates of nonsuicidal physically self-damaging acts in 12–14 year olds, a two stage epidemiologic survey with a self-administered questionnaire (N=3283) followed by a psychiatric interview of a subsample of the adolescents and their parents (N=444) was used. Prevalence estimates of interview validated nonsuicidal physically self-damaging acts were 2.46% in males and 2.79% in females. Significant relationships were found between nonsuicidal physically self-damaging acts and suicidal ideation, major depression and undesirable life events. Data suggest that physically self-damaging acts occur at substantial rates during early adolescence. The strong correlation between nonsuicidal self-destructive acts and both suicidal ideation and major depression clarifies prior conflicting reports in the literature and suggests that a history of self-damaging acts should be taken into consideration when evaluating for possible depression and suicide risk.  相似文献   
968.
Sexpert, an expert computer program designed to counsel couples on their sexual relationships, was evaluated. Eighty-one heterosexual couples were assigned to one of three experimental manipulations (Sexpert, video, and self-help book) or a control condition. Daily sexual behavior monitoring forms and structured retrospective reports served as measures of baseline and post-manipulation behavior. Daily monitoring of sexual behavior failed to show significant changes occurring after the manipulations. However, retrospective data concerning the postmanipulation period show that compared with the control, the Sexpert, video, and book manipulations had a significant positive impact on couples’ sexual behavior, communication, and learning about sexuality. Sexpert, video, and book were similarly evaluated, except that Sexpert was evaluated as more engaging. In addition, subjects retrospectively reported positive changes in communication, relationship satisfaction, and sexual behavior during the baseline period. This suggests that daily behavioral monitoring is intrusive and may confound the variables measured by it.  相似文献   
969.
A critical problem in most real-time programming tasks is the verification that timing of the presented displays and recorded events occur at the expected times. It is often difficult for psychologists to verify critical timing because of the lack of costly specialized tools and technicians to measure events with millisecond accuracy. Algorithms utilized in a new Time Audit mechanism, added to the Micro Experimental Laboratory, are described. This new mechanism involves the recording and time stamping of all input and output events with 0.1-msec accuracy. This allows the experimenter to determine the initiation, duration, and termination of each event and also makes it possible to relate these events to the synchronization of the screen refresh cycle. A customized user interface provides a time log and event-tracing feature that enables nonprogrammers to determine the duration of command execution to the .1-msec level, allowing rapid, precise assessment of program execution. The resulting time log provides a detailed specification of the experimental events for debugging and a permanent record of the experimental procedure.  相似文献   
970.
Subjects wielded occluded rods, with or without attached masses, and reported the distances reachable with their distal tips. Experiments 1–3 compared wielding about the wrist, the elbow, and the shoulder. Experiments 4 and 5 compared free wielding, using the whole arm, with wielding only about the wrist. The two comparisons, respectively, were of spatial and temporal variations in the rod’s rotational inertia. Perceived extent was found to be constant in both comparisons. This constancy was tied to the inertia tensorI ij defined about a point that remains a fixed distance from the object during wielding—an invariant of the spatially and temporally dependent patterning of mechanical energy impressed upon the tissues of the body. Discussion focused on the reciprocal action and perception capabilities of multisegmented limbs, the tensorial relations in the neurobiology of dynamic touch, and the strategy of understanding perceptual constancy through invariants.  相似文献   
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