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   7282篇
  免费   308篇
  国内免费   2篇
  2021年   87篇
  2020年   136篇
  2019年   112篇
  2018年   177篇
  2017年   169篇
  2016年   216篇
  2015年   163篇
  2014年   194篇
  2013年   695篇
  2012年   340篇
  2011年   345篇
  2010年   227篇
  2009年   215篇
  2008年   303篇
  2007年   312篇
  2006年   257篇
  2005年   272篇
  2004年   258篇
  2003年   240篇
  2002年   248篇
  2001年   125篇
  2000年   86篇
  1999年   128篇
  1998年   104篇
  1997年   109篇
  1996年   90篇
  1995年   90篇
  1994年   78篇
  1993年   83篇
  1992年   92篇
  1991年   87篇
  1990年   71篇
  1989年   52篇
  1988年   53篇
  1987年   59篇
  1986年   63篇
  1985年   74篇
  1984年   69篇
  1983年   70篇
  1982年   71篇
  1981年   77篇
  1980年   72篇
  1979年   67篇
  1978年   74篇
  1977年   75篇
  1976年   69篇
  1975年   57篇
  1974年   60篇
  1968年   41篇
  1966年   42篇
排序方式: 共有7592条查询结果,搜索用时 15 毫秒
121.
Thomas D. Senor 《Synthese》1993,94(3):453-476
In this paper I argue that internalistic foundationalist theories of the justification of memory belief are inadequate. Taking a discussion of John Pollock as a starting point, I argue against any theory that requires a memory belief to be based on a phenomenal state in order to be justified. I then consider another version of internalistic foundationalism and claim that it, too, is open to important objections. Finally, I note that both varieties of foundationalism fail to account for the epistemic status of our justified nonoccurrent beliefs, and hence are drastically incomplete.  相似文献   
122.
An overview is presented of a pilot psychoendocrine study of PTSD inpatients in comparison with several subgroups of schizophrenic and affective disorder patients. Using a hormonal profile including Cortisol, norepinephrine, epinephrine, testosterone, and thyroxine, it was found that the mean values for the PTSD group were at or near the extreme end of the range for every hormone measured, i.e., relatively low for Cortisol and high for the remaining hormones. The possible clinical meaning of these findings is considered in the light of prior psychoendocrine research on chronic stress. The hormonal alterations in PTSD appear to be persistent and suggest the possibility of being linked largely to traits or character structure, perhaps particularly to cognitive variables related to defense and coping mechanisms, as reviewed in detail for each hormonal system. There appears to be a potential for a fruitful union between the traumatic stress and psychoendocrine fields and some future strategies for developing and strengthening such a union are suggested.  相似文献   
123.
124.
125.
126.
The purpose of this study was to examine the predictive validity of a teacher nomination procedure for identifying at- risk children. Two hundred and twenty-five children were nominated by their teachers as well- adjusted (n= 75), socially withdrawn (n=76), or socially aggressive (n=74) during the fourth grade. Five years later, 198 of these children (88%) were located and their adjustment evaluated. Significant differences among the nominated children were found on a variety of measures, including academic grades, sociometric status, and social behavior. In addition, differences in school dropout and delinquent offenses were noted. Results are discussed in terms of the validity of teacher nomination procedures and their utility in identifying at- risk youth.  相似文献   
127.
128.
129.
When procedural artifacts are controlled, it has been difficult to demonstrate directed forgetting in pigeons. However, previous research with pigeons has not allowed for the reallocation of working memory (from forget items to remember items) on forget-cued trials as is possible in human directed forgetting experiments. In the present experiment, directed forgetting was found while controlling for procedural artifacts and allowing the pigeons to reallocate memory resources on forget trials. The results indicate that under these conditions, pigeons have active control over memory processing.  相似文献   
130.
A multidisciplinary group of genetic and other professionals discuss a complex case of familial conflict over access to genetic information. One twin wishes to know the results of her deceased mother's tests for BRCA1 mutations; a second twin objects to researchers making this information available. As the case discussion unfolds, the apparent facts of this case are called into question and the lines of ethical certainty become less clear.  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