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   42184篇
  免费   896篇
  国内免费   5篇
  43085篇
  2020年   440篇
  2019年   480篇
  2018年   705篇
  2017年   710篇
  2016年   768篇
  2015年   566篇
  2014年   654篇
  2013年   2892篇
  2012年   1289篇
  2011年   1285篇
  2010年   804篇
  2009年   671篇
  2008年   1129篇
  2007年   1063篇
  2006年   948篇
  2005年   845篇
  2004年   787篇
  2003年   719篇
  2002年   726篇
  2001年   1282篇
  2000年   1240篇
  1999年   904篇
  1998年   403篇
  1997年   350篇
  1992年   867篇
  1991年   809篇
  1990年   832篇
  1989年   723篇
  1988年   716篇
  1987年   686篇
  1986年   715篇
  1985年   793篇
  1984年   593篇
  1983年   550篇
  1982年   366篇
  1981年   363篇
  1979年   686篇
  1978年   426篇
  1977年   418篇
  1976年   413篇
  1975年   584篇
  1974年   672篇
  1973年   714篇
  1972年   620篇
  1971年   584篇
  1970年   576篇
  1969年   564篇
  1968年   756篇
  1967年   665篇
  1966年   598篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
251.
Insight is a core concept in psychoanalytic theory. The Oedipus myth has been a central metaphor in the evolution of psychoanalytic theory, particularly the psychoanalytic theory of development. Similarly, Sophocles' drama, its relation to the myth, and its repeated reinterpretation throughout the ages provide a valuable metaphor for our understanding of the role of insight in psychoanalysis and in development. We may have underestimated the importance of insight in normal development while oversimplifying its significance as an agent of therapeutic change.  相似文献   
252.
Loneliness in relation to depression and self-esteem   总被引:1,自引:0,他引:1  
  相似文献   
253.
This study investigated the effect of EMG biofeedback training in reducing muscle tension among subjects who displayed Type A behavior. 22 Type A college students (19 to 22 yr. old) were randomly assigned to either a biofeedback group or a control group. After 6 wk. of training, Type A subjects showed a significant reduction in muscle tension for both resting and aroused states; however, the reduction of muscle tension did not result in reduction of Type A behavior patterns.  相似文献   
254.
Two studies that seem to show conflicting effects of sex role on psychomotor reminiscence and performance are reviewed, and an effort is made to reconcile the discrepant results.  相似文献   
255.
9 stutterers and 9 nonstutterers were administered a dichotic digits test under conditions of free recall and directed attention. Analysis indicated right-ear preference for both groups and no differences between the free recall and directed listening conditions. Results are discussed in relation to previous studies in which dichotic digit-stimuli were presented to stutterers.  相似文献   
256.
6 adult subjects (3 men, 3 women) produced highly similar spontaneous speech utterances in quiet and with 90-dB SPL white noise. The frequency of occurrence of perceptual judgments of primary stressing in an utterance was not affected by the masking noise. This finding supplements our previous report that variability for stress production of fundamental frequency (fo) during spontaneous speech was preserved under short-term auditory disruption. Also, it adds further support to the contention that fo is under open-loop regulation.  相似文献   
257.
Children's perception of parental exercise: influence of sex and age   总被引:1,自引:0,他引:1  
The purpose of the study was to document children's perception of parental exercise, relating these perceptions to (1) the self-reported parents' habits of exercise, and (2) the children's own activity patterns. The subjects were 198 students of both sexes, aged 12 to 14 yr. and enrolled in school Grades 7 to 9. A standard questionnaire assessed their perceptions of parental and personal physical activity. Both parents of each subject also reported their respective levels of habitual physical activity. Congruence between the children's perceptions and the self-reported exercise habits of the opposite-sex parent differed for boys and girls, increasing for boys and decreasing for girls between Grades 7 and 9. No significant associations were observed between the children's perception of parental exercise patterns and their own like habits. This suggests that during adolescence parental influences are minimized by other factors, personal or environmental.  相似文献   
258.
259.
Twenty-two right hemisphere brain-damaged and 22 non-brain-damaged patients were given a multiple-choice recognition task which contained true statements, statements which were inferentially true but not actually heard before, and false statements. It was hypothesized that if right hemisphere brain damage disturbs the ability to comprehend inferences, these subjects, unlike their normal counterparts, would not falsely recognize true inferences as heard before. This hypothesis was not confirmed. However, the right hemisphere group was poorer than controls at rejecting false statements. This behavior was speculated to be a retrieval difficulty, which was exacerbated if the information contained spatial or semantically similar material.  相似文献   
260.
Decision processes in visual discrimination of line orientation   总被引:4,自引:0,他引:4  
The contribution of decision factors to the meridional variations in line orientation discrimination was determined for two-alternative forced-choice experimental designs. Using Johnson's (1980) formalization of decision processes in discrimination tasks, we identified three decision factors: the decision rule, memory variance, and criterial noise. In a first experiment, we showed the effect of experimental design on orientation discrimination to be similar at horizontal and oblique standard orientations, indicating that the meridional variations in orientation discrimination were not due to a decision rule anisotropy. In a second experiment, the effect of the interstimulus interval was also found to be similar at both standard orientations, suggesting that the memory variance is isotropic in the orientation domain. The results of two other experiments supported the hypothesis that the meridional variations in orientation discrimination are not due to a criterial noise anisotropy. These different results strongly suggested that the oblique effect in line orientation discrimination is due to sensorial factors rather than to decision factors. Therefore, they further support the hypothesis linking the anisotropy of the preferred orientation distribution of Area 17-S cells (a single physiologically defined class of cells in the primary visual cortex) and the meridional variations in line orientation discrimination.  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