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   183949篇
  免费   8128篇
  国内免费   155篇
  192232篇
  2020年   2785篇
  2019年   3448篇
  2018年   3751篇
  2017年   4116篇
  2016年   4778篇
  2015年   3938篇
  2014年   4803篇
  2013年   23440篇
  2012年   5083篇
  2011年   4336篇
  2010年   4097篇
  2009年   4883篇
  2008年   4428篇
  2007年   3973篇
  2006年   4425篇
  2005年   4305篇
  2004年   3870篇
  2003年   3455篇
  2002年   3245篇
  2001年   4026篇
  2000年   3777篇
  1999年   3552篇
  1998年   2882篇
  1997年   2695篇
  1996年   2617篇
  1995年   2447篇
  1994年   2410篇
  1993年   2367篇
  1992年   2915篇
  1991年   2722篇
  1990年   2562篇
  1989年   2477篇
  1988年   2435篇
  1987年   2402篇
  1986年   2420篇
  1985年   2661篇
  1984年   2646篇
  1983年   2404篇
  1982年   2403篇
  1981年   2362篇
  1980年   2212篇
  1979年   2355篇
  1978年   2260篇
  1977年   2209篇
  1976年   2019篇
  1975年   2095篇
  1974年   2187篇
  1973年   2068篇
  1972年   1661篇
  1971年   1599篇
排序方式: 共有10000条查询结果,搜索用时 9 毫秒
981.
Visual processing was investigated in judgments of relative line position. Stimulus continua were generated by bisecting a straight line and displacing the segments. Experiment 1 measured discrimination of pairs of longitudinally displaced segments at equal steps along the continuum. At long (2 s) durations discrimination fell smoothly, but at short (100 ms) durations it was sharp-peaked. In Experiment 2 the short-duration stimuli were labeled with subsets of the labels no gap, just a gap, and more than just a gap. Theoretical discrimination performances were computed and the one based on no gap and just a gap closely fitted observed performance. Experiments 3 and 4 were similar to 1 and 2, with lateral replacing longitudinal displacement. Similar "categorical" performance was obtained. It was concluded that there are discrete mechanisms for early detection of relative line position and that 2 labels can be used to characterize performance in each direction.  相似文献   
982.
We explored Roediger and Payne's proposal that response bias does not affect recall performance and that it is therefore not necessary to control for response productivity in recall studies. Two initial experiments, contrary to expectation, corroborated Roediger and Payne's findings: Forced recall did not produce more correct recalls than free recall, even though forced recall produced substantially more false alarms than did free recall. However, in succeeding experiments involving pictorial and verbal stimuli, reliable response-bias effects on recall were demonstrated. The stimuli yielding response-bias effects were those associated with higher probabilities of being guessed by chance. In addition, some of the data suggest that processing-bias effects (differential retrieval effort) may be unintentionally induced by instructions and may significantly affect recall memory. Consequently, it is necessary to assess or to control response-bias effects and, possibly, processing-bias effects in recall experiments in which level of recall is of interest.  相似文献   
983.
Varieties of size-specific visual selection   总被引:1,自引:0,他引:1  
Compared time to evaluate stimuli of varying sizes. When Ss expect an upcoming stimulus to be a certain size, response time increases with the disparity between expected and actual size. There are, however, 2 size adjustment processes, and they reflect 2 types of visual selection. In the first, a shape-specific image representation is used to separate a visual object from a superimposed distractor. These representations require the type of slow size scaling demonstrated in imagery experiments. The second size scaling process is faster and not shape-specific. At any given time the visual system is set to process information at a particular scale, and that scale can be adjusted to match an object's size. Because both selection mechanisms depend on size, they probably occur at a relatively low, spatially organized processing level. These findings lead to a new explanation for results that had been taken as evidence for attentional selection at the level of object representations.  相似文献   
984.
This article is an examination of the political (public consensus) and nonpolitical authority as a basis for values education in a democratic society. The author advocates that nonpolitical authority can be a basis for defending the teaching of values in public schools.  相似文献   
985.
Mental health values consist of the subset of values that refer to what constitutes good mental health. Torrey (1972) suggested that agreement between patient and therapist about such values may influence psychotherapy outcome. The authors found mixed support for this hypothesis using a sample of 100 chemical dependency inpatients. Positive treatment effects were associated with pretreatment agreement between counselor and patient about some mental health values, but with pretreatment disagreement about others. Because outcome measures assess general personality functioning, the authors suggest that attitudes about what constitutes good mental health may predict general psychotherapy effects as well as response to alcoholism treatment.  相似文献   
986.
Members of the New Right regularly charge that public schools teach secular humanism. This alleged teaching of secular humanism is held responsible for varied social ills and is perceived as a violation of constitutional prohibitions against the advocacy of one set of religious beliefs over others. Although New Right attacks may be perceived as political tactics, the author explores them as empirical claims that schools are in fact teaching secular humanism. Currently, there is no persuasive body of research supporting the New Right allegations. The author questions whether or not such research could be designed and concludes that it could but, for various reasons, is unlikely ever to be enacted.  相似文献   
987.
In this article the author reports results from a national survey of recovering alcoholic Catholic Sisters, describing their addiction history, treatment, and the role of the community.  相似文献   
988.
989.
This study investigated both an applicant pool and its resulting class of new hires in an attempt to clarify a number of empirical questions concerning recruiting source effectiveness. A pre-established database of applicants and hires for the job of life insurance agent in a large insurance company was analyzed for recruiting activity. Differences in applicant quality and new hire survival were found in favor of the informal recruiting sources. A second measure of hire success, new business commission credits, failed to show differences across recruiting sources. The informal recruiting sources yielded significantly higher selection ratios than did formal sources for all groups. Examination of recruiting source use showed significant group differences, with females and blacks using the formal recruiting sources more frequently than males, non-minorities, and Hispanics. While the informal recruiting sources yielded higher quality applicants and more successful hires for all groups, this research cautions that the implementation of revised recruiting policies must be carefully monitored for adverse effects on protected groups.  相似文献   
990.
Experimental studies were conducted in two unions to examine the effects of perceptual variables–namely, reactance and intentionality attributions–on the intent to seek redress from management action. Participants responded to a series of vignettes, each of which described a management action (formal punishment, informal warning, promotion denial) taken against an employee. The vignettes varied systematically in terms of the perceived threat to worker freedom posed by the action and the degree to which the action was motivated by a dispositional rather than an environmental attribution. Both studies demonstrated that greater threat and dispositional attributions provoked stronger intent to file a grievance. Implications of the findings were discussed for investigating and screening grievances.  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