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   51975篇
  免费   2079篇
  国内免费   30篇
  2020年   581篇
  2019年   733篇
  2018年   1055篇
  2017年   1052篇
  2016年   1107篇
  2015年   738篇
  2014年   908篇
  2013年   4508篇
  2012年   1644篇
  2011年   1793篇
  2010年   1042篇
  2009年   1060篇
  2008年   1626篇
  2007年   1604篇
  2006年   1411篇
  2005年   1282篇
  2004年   1255篇
  2003年   1138篇
  2002年   1180篇
  2001年   1747篇
  2000年   1648篇
  1999年   1262篇
  1998年   662篇
  1997年   569篇
  1996年   512篇
  1995年   516篇
  1994年   494篇
  1993年   515篇
  1992年   1008篇
  1991年   953篇
  1990年   939篇
  1989年   849篇
  1988年   812篇
  1987年   800篇
  1986年   803篇
  1985年   853篇
  1984年   667篇
  1983年   576篇
  1982年   469篇
  1979年   653篇
  1978年   485篇
  1976年   446篇
  1975年   589篇
  1974年   619篇
  1973年   594篇
  1972年   539篇
  1971年   473篇
  1968年   539篇
  1967年   540篇
  1966年   475篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
761.
A behavior-analytic critique of self-efficacy theory is presented. Self-efficacy theory asserts that efficacy expectations determine approach behavior and physiological arousal of phobics as well as numerous other clinically important behaviors. Evidence which is purported to support this assertion is reviewed. The evidence consists of correlations between self-efficacy ratings and other behaviors. Such response-response relationships do not unequivocally establish that one response causes another. A behavior-analytic alternative to self-efficacy theory explains these relationships in terms of environmental events. Correlations between self-efficacy rating behavior and other behavior may be due to the contingencies of reinforcement that establish a correspondence between such verbal predictions and the behavior to which they refer. Such a behavior-analytic account does not deny any of the empirical relationships presented in support of self-efficacy theory, but it points to environmental variables that could account for those relationships and that could be manipulated in the interest of developing more effective treatment procedures.  相似文献   
762.
763.
764.
Within a multivariate statistical design, the relationship of various interpersonal, emotional, and cognitive variables to suicidal ideation and behavior in college students was examined. A total of 158 subjects (58 males, 100 females) completed self-report measures of life stress, faulty cognitions, loneliness, depression, hopelessness, family cohesiveness, adaptive reasons for living, and suicidal ideation and behavior. The results of a multiple-regression analysis, forward-inclusion algorithm, indicated that a predictive equation consisting of loneliness, irrational beliefs, and low adaptive reasons for living best accounted for suicidal behavior scores. To determine the basic structures and power of the predictor variables under study, a factor analysis and composite regression were employed, resulting in a predictive equation consisting of three factors: Social/Emotional Alienation, Cognitive Distortions, and Deficient Adaptive Resources. Results are discussed in terms of an interactional model of suicidal behavior.  相似文献   
765.
766.
Daily life events were grouped according to their life content area and according to the desirability of the event as rated by the subject. Associations among event groupings and concurrently measured daily mood were examined. As in studies of major life events, some event classifications were more strongly associated with mood than were others: Specifically, desirable family-leisure events and undesirable work events were strongly related to mood. The results suggests that particular life areas deserve special attention in understanding environmental stress.  相似文献   
767.
768.
The results of an evaluation of the perfusion scintigraphy findings of 350 hospitalised neurological patients and 55 more strictly selected neurosurgical patients with cerebrovascular complaints, revealed an accuraty of 83%, a sensitivity of 89%, and a specificity of 83%. The selection of the patients had no influence on the results as a whole. Compared with contrast-medium angiography, incorrect diagnosis must be expected in 17% of the cases. This includes erroneous negative findings in 10% of the cases. Grounds for misinterpretations are suggested, and the biological and methodological limitations of the method are set forth.  相似文献   
769.
The paper presents the results of detailed diagnosis of 51 patients with torticollis spasmodicus. A discussion of the results would seem to indicate the possibility of there being one group with prior neuroses, one group compulsive in nature, and one group whose diminished performance arises from the condition of the brain. Reliable diagnosis is only possible when both mental and physical parameters have been taken into consideration.  相似文献   
770.
It is reported on four girls aged 8 to 20 with Incontinentia pigmenti (Ip) The ectodermal dysplasia was associated with oligophrenia, therapy resistant epilepsy with severe psychorganic syndromes and dementia, Lennox syndrome, lability of emotion with severe disorders of social adaptations, spasticity, hypo- and areflexia, hemiathetosis, choreiform unrest, pathological EEG findings, including spike-potentials; relations to cleidocranial dysostosis, dysraphia, Poland's, Greig's and Chotzen's syndrome were found. Ip means unfavourable prognosis and progression of neuropsychiatric disorders.  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