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   41506篇
  免费   1682篇
  国内免费   17篇
  2020年   395篇
  2019年   466篇
  2018年   650篇
  2017年   650篇
  2016年   739篇
  2015年   540篇
  2014年   646篇
  2013年   2921篇
  2012年   1216篇
  2011年   1192篇
  2010年   738篇
  2009年   698篇
  2008年   1050篇
  2007年   1070篇
  2006年   921篇
  2005年   910篇
  2004年   834篇
  2003年   770篇
  2002年   781篇
  2001年   1310篇
  2000年   1258篇
  1999年   923篇
  1998年   450篇
  1997年   390篇
  1992年   892篇
  1991年   824篇
  1990年   834篇
  1989年   737篇
  1988年   744篇
  1987年   705篇
  1986年   728篇
  1985年   807篇
  1984年   621篇
  1983年   581篇
  1982年   402篇
  1981年   380篇
  1979年   708篇
  1978年   459篇
  1977年   429篇
  1976年   436篇
  1975年   599篇
  1974年   690篇
  1973年   733篇
  1972年   622篇
  1971年   582篇
  1970年   574篇
  1969年   562篇
  1968年   751篇
  1967年   667篇
  1966年   596篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
151.
Using a multi-trial, free-recall paradigm (Rey Auditory-Verbal Learning Test; Lezak, 1983), the acquisition and retention by learning disabled (LD) young adults with a Halstead Impairment Index less than or equal to 0.3 (low LD) or greater than or equal to 0.4 (high LD) was compared with that of nondisabled and head-injured (HI) young adults. Significant group differences, particularly during the last three acquisition trials, confirmed the effectiveness of this method in revealing subtle learning and retention deficits. Analyses of Trial 1 recall showed group differences in the prerecency but not the recency portion of the serial position curve, thus implicating long-term but not short-term memory differences between the groups. Analyses of pair frequency (Sternberg & Tulving, 1977) data showed that the three clinical groups had difficulty organizing the to-be-learned material for effective retrieval. Following an interpolated task, retention was poorer for the clinical groups than for the nondisabled and varied inversely with the degree of neuropsychological impairment. Finally, during retention, the nondisabled and low LD groups retained and used the list organization established during acquisition whereas the high LD and HI groups did not.  相似文献   
152.
Inexperienced beer-drinkers who could not pass a beer-flavor discrimination test were divided into a taste group, which received additional perceptual experience with beer flavors; a verbal group, which received instruction in beer flavor terminology; a taste/verbal group, which received both additional experience and instruction; and a control group. Before and after training, all subjects participated in a similarity rating task involving beer flavors and flavor-related adjectives. Additional taste experience--but not increased experience with beer-flavor terminology--improved novices' ability to detect identical beer flavors. Results are discussed in terms of the trainability of flavor discrimination and the role of cognitive factors (both flavor-related and flavor-independent) in marketing beverages.  相似文献   
153.
Subjects were presented with word pairs (e.g., bed-mattress) and timed as they decided whether one word named part of the item named by the other word. Yes responses were facilitated, and no responses were impeded, by relation similarity (i.e., the similarity of the relation between the two stimulus items to the part-whole relation). Item similarity, the similarity of the two stimulus items to each other, had no effect. The results support the view that similarity effects in semantic decision tasks are due to the comparison of elements of the relation between the two stimulus words against relation elements that serve as criteria for the target relation that the subject has been asked to identify.  相似文献   
154.
Thirty pediatricians and 30 parents were interviewed on (a) how and when children develop concepts about death, (b) children's emotional responses to the thought of death, (c) the possibility of dialogue between adults and children about death, and (d) differences in healthy and seriously ill children's conceptualization of death. Pediatricians were no different than parents in their opinions. Moreover, in some cases, less educated parents and older doctors tended to hold opinions that were even farther from reality. Overall, the results suggest that children, healthy or sick, are left alone with the problem of death and are not helped either by their parents or by their doctors.  相似文献   
155.
156.
Tobacco, alcohol, and drug use are problems for American-Indian people. We reviewed these problems and the explanations for them and described a bicultural competence skills approach for preventing substance abuse with American-Indian adolescents. Data from a study of that approach suggest its efficacy with American-Indian youth. At posttest and a 6-month follow-up, American-Indian subjects who received preventive intervention based on bicultural competence skills concepts improved more than did American-Indian subjects in a no-intervention control condition on measures of substance-use knowledge, attitudes, and interactive skills, and on self-reported rates of tobacco, alcohol, and drug use. Our findings have implications for future substance-abuse prevention research with American-Indian people.  相似文献   
157.
Training in systemic therapy necessitates a structured approach to teaching systemic thinking. The Systemic Therapy Sessions Summary Form, a record-keeping method, is presented as a tool for enhancing training in systemic therapy. The purpose of this form is to provide the structure for the trainee to develop circular hypotheses, to connect reflexively the assessment and intervention components of therapy, and to maintain a sense of the evolving nature of therapy across sessions. A case example illustrates the use of this record-keeping format.  相似文献   
158.
159.
160.
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