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   22393篇
  免费   119篇
  22512篇
  2023年   11篇
  2022年   22篇
  2021年   27篇
  2020年   39篇
  2019年   53篇
  2018年   3524篇
  2017年   2872篇
  2016年   2299篇
  2015年   247篇
  2014年   138篇
  2013年   354篇
  2012年   658篇
  2011年   2479篇
  2010年   2563篇
  2009年   1528篇
  2008年   1778篇
  2007年   2240篇
  2006年   108篇
  2005年   294篇
  2004年   232篇
  2003年   169篇
  2002年   126篇
  2001年   60篇
  2000年   82篇
  1999年   47篇
  1998年   55篇
  1997年   47篇
  1996年   33篇
  1995年   15篇
  1994年   15篇
  1993年   23篇
  1992年   23篇
  1991年   17篇
  1990年   24篇
  1989年   22篇
  1988年   15篇
  1987年   19篇
  1986年   12篇
  1985年   23篇
  1984年   20篇
  1983年   19篇
  1982年   25篇
  1981年   24篇
  1980年   14篇
  1979年   15篇
  1978年   13篇
  1977年   12篇
  1976年   16篇
  1974年   9篇
  1973年   13篇
排序方式: 共有10000条查询结果,搜索用时 18 毫秒
31.
Increased eating in rats deprived of running   总被引:2,自引:1,他引:1       下载免费PDF全文
Daily food intake in rats was temporarily reduced by the introduction of an activity wheel and temporarily increased by the subsequent removal of the wheel. When this outcome is coupled with the positive relation between food deprivation and running—and food deprivation is seen as a loss of eating rather than as a physiological state—there is the suggestion that the total behavior output of the organism may be regulated as such. Specifically, when the rat is deprived of a behavior that recurrently comprises a large part of its total daily activity, an increase may occur in some other behavior.  相似文献   
32.
33.
The disambiguation of threat/neutral homophones was investigated in high- and low-trait anxiety subjects who had been exposed to either a positive or a negative mood manipulation procedure. Subjects were required first to spell each auditorily presented word and second, to generate and speak a sentence using the word. Difference indices were calculated for the spelling and the sentence usage data, i.e. the number of threat minus neutral interpretations. Examination of these indices revealed that subjects exposed to the negative mood manipulation procedure produced relatively more threat than neutral interpretations (for both spelling and sentence usage) than did subjects exposed to the positive mood manipulation procedure. Multiple regression analyses revealed that both the trait anxiety and mood manipulation variables contributed significantly to the prediction of the difference index on the spelling task. In the analysis of the use of homophones in sentences, only the mood manipulation variable contributed significantly to the prediction of the difference index on the sentence usage task.  相似文献   
34.
The structure of a course entitled Family Therapy with Major Psychopathology taught annually in the Mercer University Graduate Marriage and Family Therapy Program is presented. An epistemological presentation regarding the interface of psychiatric nosology and family systems assessment is discussed. Methods of diagnosing and assessing dysfunctional family systems are presented and training in individual psychiatric nosology is discussed, with particular attention given to family systems dysfunction as an etiological factor in the development of individual psychopathology. Learning techniques are discussed including lecture, discussion, case presentations, readings, and testing methods.  相似文献   
35.
Three mildly malnourished children with cystic fibrosis and their parents participated in a behavioral group-treatment program that focused on promoting and maintaining increased calorie consumption. Treatment included nutritional education, gradually increasing calorie goals, contingency management, and relaxation training, and was evaluated in a multiple baseline design across four meals. Children's calorie intake increased across meals, and total calorie intake was 32% to 60% above baseline at posttreatment. Increased calorie consumption was maintained at the 96-week follow-up (2 years posttreatment). The children's growth rates in weight and height were greater during the 2 years following treatment than the year prior to treatment. Increases in pace of eating and calories consumed per minute were also observed 1 year posttreatment. These findings replicated and extended earlier research supporting the efficacy of behavioral intervention in the treatment of malnutrition in children with cystic fibrosis.  相似文献   
36.
37.
The essay examines the argument advanced by E.D. Hirsch, Jr., for instituting ‘cultural literacy’ as a fundamental priority of schools. A number of confusions and equivocations in Hirsch's reasoning are identified, and the propensity of his project to indoctrinate is exposed. Among the features of Hirsch's argument shown to be troubling are his shifting construal of ‘language’, his inconsistency about the requirements of cultural literacy, and his uncritical relation to traditional images of the American past and present. The upshot is to raise the question why Hirsch's project has elicited wide support and praise.  相似文献   
38.
In this article, a theoretical distinction is proposed between representative outgroup minorities (representative of a minority category in the society, e.g. gays) and dissident outgroup minorities (defined as a minority subgroup within a larger outgroup category). Two studies are reported comparing the social influence of dissident outgroup minorities with that of ingroup minorities (belonging to the subject's own social category). It was predicted that a position advocated by a dissident outgroup minority would be more readily accepted than that of an ingroup minority, but that the ingroup minority would be more likely to elicit the generation of new, alternative solutions. A first experiment in which subjects were either exposed to an ingroup minority, an outgroup minority, or no influence source confirmed these predictions. In a second experiment, subjects were either exposed to a majority or to a minority source either belonging to the subject's own social category or to the outgroup. The results indicate that the position of an ingroup majority was readily accepted whereas the otherwise identical message of an outgroup majority was rejected; neither ingroup nor outgroup majority stimulated the development of alternative proposals. Again, in line with Nemeth' (1986a) theory, the position of an ingroup minority was rejected but stimulated the generation of new, alternative proposals. The differential role of social category membership in minority and majority influence and the applicability of Nemeth' (1986a) theory to the attitude change area are discussed.  相似文献   
39.
40.
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