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   55352篇
  免费   626篇
  国内免费   5篇
  55983篇
  2020年   422篇
  2019年   465篇
  2018年   3930篇
  2017年   3324篇
  2016年   2820篇
  2015年   667篇
  2014年   708篇
  2013年   3160篇
  2012年   1705篇
  2011年   3507篇
  2010年   3158篇
  2009年   2155篇
  2008年   2673篇
  2007年   3105篇
  2006年   1061篇
  2005年   1133篇
  2004年   1049篇
  2003年   973篇
  2002年   966篇
  2001年   986篇
  2000年   1005篇
  1999年   772篇
  1998年   464篇
  1997年   429篇
  1996年   387篇
  1994年   350篇
  1993年   344篇
  1992年   580篇
  1991年   552篇
  1990年   578篇
  1989年   526篇
  1988年   477篇
  1987年   505篇
  1986年   523篇
  1985年   571篇
  1984年   486篇
  1983年   431篇
  1982年   359篇
  1981年   356篇
  1979年   488篇
  1978年   398篇
  1977年   351篇
  1975年   435篇
  1974年   464篇
  1973年   435篇
  1972年   379篇
  1969年   359篇
  1968年   387篇
  1967年   345篇
  1966年   348篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
101.
102.
The central question concerns the relationship between aspects of behaviour and physiological reactions. Measures of sympathetic-adrenal activity in terms of adrenaline excretion in a normal and a stressful situation as well as teacher ratings of behaviour were analysed for a representative group of 86 boys aged 13. Adrenaline excretion was in both situations significantly negatively related to ratings of aggressiveness, motor restlessness, and concentration difficulties and also to the sum of the latter two, used as an indicator of hyperactive behaviour. The association between hyperactive behaviour and adrenaline excretion persisted in the stressful situation when aggressiveness was controlled, whereas there was no significant relationship between aggressiveness and adrenaline output when hyperactive behaviour was controlled. Furthermore, hyperactive boys differed significantly from non-hyperactive boys in displaying lower adrenaline excretion in both situations. The results are discussed in terms of low sympathetic-adrenal reactivity to external demands as a risk factor and as a possible indicator of vulnerability for social and/or pervasive conduct disturbances.  相似文献   
103.
104.
Alcohol-related expectancies have been recently proposed as potentially important determinants of drinking behavior. This study describes the development of a New Zealand measure of such beliefs, the Drinking Expectancy Questionnaire (DEQ). Items selected through interviews, literature review, and the modification of other relevant questionnaires were piloted on 333 drinkers in a community sample and 275 college students. Factor analyses of both samples revealed nine alcohol reinforcement domains relating to assertiveness, affective change, sexual enhancement, social enhancement, relaxation, cognitive impairment, dependence, carelessness, and aggression. The potential clinical and research possibilities using this revised expectancy measure are briefly discussed, along with the scale's strength and weaknesses.The financial assistance of the Alcoholic Liquor Advisory Council of New Zealand in conducting this study is gratefully acknowledged.  相似文献   
105.
The increasing incidence of AIDS has created a societal fear of AIDS that, in turn, has raised the level of fear and anxiety in individuals prone to fear responses. Fears accentuated by AIDS are discussed and guidelines for counseling offered.  相似文献   
106.
This article examines the hindsight bias in the context of mental health malpractice litigation, analyzes various legal mechanisms for dealing with the bias, and discusses whether the law should strive for debiasing in all mental health malpractice cases.  相似文献   
107.
108.
Researchers interested in studying discrimination learning in primates have typically utilized variations in the Wisconsin General Test Apparatus (WGTA). In the present experiment, a new testing apparatus for the study of primate learning is proposed. In the video-task paradigm, rhesus monkeys (Macaca mulatta) respond to computer-generated stimuli by manipulating a joystick. Using this apparatus, discrimination learning-set data for 2 monkeys were obtained. Performance on Trial 2 exceeded 80% within 200 discrimination learning problems. These data illustrate the utility of the video-task paradigm in comparative research. Additionally, the efficient learning and rich data that were characteristic of this study suggest several advantages of the present testing paradigm over traditional WGTA testing.  相似文献   
109.
110.
The purpose of this study was to evaluate the effectiveness of a participative management (self-management) procedure directed toward increasing the frequency of positive interactions between direct-care staff and group home residents. A component of the self-management procedure, goal setting, was also evaluated. This study took place in two group homes housing a total of 16 male and female adults with moderate to mild mental retardation. Ten direct-care staff served as subjects. It was found that self-management produced an increase in the frequency of positive interactions of staff and residents, but did not produce changes in other behaviors being measured (e.g., negative interactions, self-stimulation, etc.). Goal setting did not result in changes in positive interactions or other target behaviors. Reasons for the different results of self-management versus goal-setting are discussed and further research is suggested.  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