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   21722篇
  免费   49篇
  2021年   25篇
  2020年   16篇
  2019年   26篇
  2018年   3509篇
  2017年   2839篇
  2016年   2276篇
  2015年   206篇
  2014年   104篇
  2013年   221篇
  2012年   601篇
  2011年   2444篇
  2010年   2543篇
  2009年   1494篇
  2008年   1738篇
  2007年   2211篇
  2006年   57篇
  2005年   241篇
  2004年   217篇
  2003年   149篇
  2002年   85篇
  2001年   56篇
  2000年   75篇
  1999年   32篇
  1998年   44篇
  1997年   32篇
  1996年   25篇
  1995年   22篇
  1994年   23篇
  1993年   15篇
  1992年   22篇
  1991年   15篇
  1990年   27篇
  1989年   15篇
  1988年   22篇
  1987年   17篇
  1986年   12篇
  1985年   14篇
  1984年   17篇
  1983年   23篇
  1981年   14篇
  1980年   14篇
  1979年   18篇
  1978年   14篇
  1977年   14篇
  1976年   14篇
  1975年   13篇
  1974年   16篇
  1973年   12篇
  1967年   12篇
  1950年   13篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
Effects of social support, negative life events, and daily hassles on depressive symptoms were assessed in 301 adults aged 65 or older, in person 3 times at 6-month intervals and by mail questionnaires every month over a 12-month period. Initial social support predicted severity of depressive symptoms 12 months later. Social support and initial levels of depressive symptomatology predicted number of daily hassles but not number of major life events. Effects of social support, depression, and major life events on the incidence of daily hassles remained significant without the inclusion of hassles reflecting depressive symptomatology or problems in relationships or whose content overlapped with major life events. Daily hassles mediated the effects of major life events on subsequent depression. Results did not differ for men and women. Implications for models of the relations among social support, stress, and depression are discussed.  相似文献   
72.
73.
74.
Forty unfamiliar, one-minute samples of modern jazz were rated by 132 undergraduates for judged complexity, pleasingness and interestingness, in a between-subjects design. Pleasingness and interestingness were positively correlated and both were decreasing linear functions of complexity, although the correlation between interestingness and complexity was low and only marginally significant. It appears that pleasingness acts as a suppressor on the interestingness/complexity correlation: with pleasingness partialled out the correlation was positive and highly significant. Partialling had only small effects on the other correlations. Results suggest that techniques used previously to study non-musical stimuli may also be applicable to music.  相似文献   
75.
The mechanisms underlying selective attention to gratings consisting of a particular conjunction of spatial frequency and orientation were investigated by means of both visual evoked potential (VEP) and behavioral measures. The effects of selective attention upon the VEP indicated two general types of selection processes: one which is specific to the features contained in the relevant gratings and is most pronounced approximately 225 msec post-stimulation, and another which is specific to the conjunction of features defining the relevant grating and is most pronounced 250–375 msec following the presentation of the stimulus. The behavioral responses primarily reflected this latter, or grating-specific, attentional process. The results are discussed in terms of the role of sensory feature channels in mediating selective attention to visual stimuli and are related to various information processing models of visual pattern selection.  相似文献   
76.
Two experiments confirmed sequential mediation of social interaction by investigating the effects of generalized expectancies on specific expectancies and the effects of specific expectancies on performance. Both experiments used a simulated tutoring task in which the subject took the role of tutor while a confederate took the role of student. In Experiment 1 subjects combined generalized expectancies about the effectiveness of certain tutoring responses with specific situational information to produce specific expectancies about the results of the tutoring responses under the experimental circumstances. Experiment 2 replicated this finding and showed that specific expectancies of the relative effectiveness of different responses influenced which response was performed more. Results were discussed in terms of cognitive motivation theory and social learning theory.  相似文献   
77.
A seven-step, behaviorally based, decision-making process was taught to 17 children, age 9–10 years. Each child's decision-making ability was measured before and after training, using two audiotaped stories that described problem situations typically encountered in the school or home. The children were asked to identify the problem, generate alternative solutions, think of positive and negative consequences for each solution, and offer a personal value supporting their decision. As compared to a no-treatment control group, the children receiving the decision-making training obtained significantly greater scores on four of five dependent measures. Implications for teaching decision-making as a self-management skill are offered.  相似文献   
78.
79.
80.
In two experiments female subjects performed a task either alone or while being observed by a female experimenter, after which they were told that they had performed well or poorly. On a paired-associates (PA) learning task that followed, subjects who performed in the presence of the observing experimenter required more trials to criterion and committed more errors than those who worked alone only if they had supposedly done poorly on the preceding task. Subjects who had done well on the prior task performed better on the PA task when observed than when alone provided that the preliminary task had also measured verbal learning. A measure of skin conductance indicated increased arousal under conditions of observation on the PA task only after a poor performance on the preceding task. The results are discussed in terms of the drive theory of social facilitation and the conditions under which being observed produces evaluation apprehension.  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