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   4255篇
  免费   175篇
  2022年   22篇
  2021年   26篇
  2020年   67篇
  2019年   55篇
  2018年   94篇
  2017年   108篇
  2016年   158篇
  2015年   69篇
  2014年   118篇
  2013年   555篇
  2012年   168篇
  2011年   185篇
  2010年   101篇
  2009年   142篇
  2008年   180篇
  2007年   178篇
  2006年   192篇
  2005年   118篇
  2004年   160篇
  2003年   139篇
  2002年   136篇
  2001年   69篇
  2000年   66篇
  1999年   61篇
  1998年   69篇
  1997年   63篇
  1996年   56篇
  1995年   51篇
  1994年   71篇
  1993年   51篇
  1992年   44篇
  1991年   38篇
  1990年   32篇
  1989年   36篇
  1988年   41篇
  1987年   44篇
  1986年   32篇
  1985年   46篇
  1984年   42篇
  1983年   35篇
  1982年   57篇
  1981年   43篇
  1980年   37篇
  1979年   34篇
  1978年   45篇
  1977年   50篇
  1976年   49篇
  1975年   41篇
  1974年   34篇
  1973年   27篇
排序方式: 共有4430条查询结果,搜索用时 15 毫秒
821.
Recent case law is discussed regarding the role of amnesia in determining competency to stand trial. Clinical issues are examined for a range of amnestic conditions on a spectrum of organic and functional disorders. Clinical methods are explored for establishing the extent of amnesia and its relevance to competency.  相似文献   
822.
Coercion is commonly said to invalidate consent, and that is always true if the source of the coercion is the physician. However, if it is a family member who coerces the patient to consent, the resultant consent may be quite valid and treatment should proceed.  相似文献   
823.
Meredith's method of extracting a factorially invariant solution is adapted to longitudinal settings. An explorational estimation procedure is presented which attempts to identify the longitudinal factor components of an across occasion variance-covariance matrix. This is effected by transforming an initial factor pattern matrix to stationarity. The estimation is performed in two parts, the first employing a stepwise algorithm to ascertain the dimensionality and existence of the longitudinal components and the second being the direct estimation of the existing factor pattern.  相似文献   
824.
Stephen L. White 《Synthese》1986,68(2):333-368
In this paper I distinguish three alternatives to the functionalist account of qualitative states such as pain. The physicalist-functionalist1 holds that (1) there could be subjects functionally equivalent to us whose mental states differed in their qualitative character from ours, (2) there could be subjects functionally equivalent to us whose mental states lacked qualitative character altogether and (3) there could not be subjects like us in all objective respects whose qualitative states differed from ours. The physicalist-functionalist2 holds (1) and (3) but denies (2). The transcendentalist holds (1) and (2) and denies (3). I argue that both versions of physicalist-functionalism inherit the problem of property dualism which originally helped to motivate functionalist theories of mind. I also argue that neither version of physicalist-functionalism can distinguish in a principled way between those neurophysiological properties of a subject which are relevant to the qualitative character of that subject's mental states and those which are not. I conclude that the only alternative to a functionalist account of qualitative states is a transcendentalist account and that this alternative is not likely to appeal to the critics of functionalism.  相似文献   
825.
Behavioral checklists were employed to identify the type and degree of psychopathology observed in 90 boys who were referred for possible placement in classrooms for the socially and emotionally disturbed (SED). School behavior was assessed by teachers completing the Conners Teacher Rating Scale, while behavior at home was rated by parents with the Child Behavior Checklist. The checklist findings from both environments showed the boys to have high levels of psychological disturbance, especially for externalizing factors such as hyperactivity, aggression, and conduct disorder. This was especially true for those boys for whom SED placement was recommended. Further, the clinical usefulness of these checklists was investigated as an adjunctive method for the determination of the need for SED placement. By the use of discriminant function analysis, about three-fourths of the boys recommended for SED placement were accurately identified; correct classification was maximized when parent and teacher checklists were employed together.  相似文献   
826.
Three preschool children participated in a behavioral training program to improve their gross-motor skills. Ten target behaviors were measured in the training setting to assess direct effects of the program. Generalization probes for two gross-motor behaviors, one fine-motor skill, and two social behaviors were conducted in other settings. Results indicated that the training program improved the gross-motor skills trained and that improvements sometimes generalized to other settings. Contrary to suggestions in educational literature, the gross-motor training program did not produce changes in fine-motor skills or social behaviors. Implications for educators and for the development of the technology of generalization are outlined.  相似文献   
827.
    
The effect of challenge on the cooperative and competitive behavior of 120 urban American children was assessed using two experimental game apparatuses, one of which provided a challenging cooperative response. Significantly more cooperation was observed when the subjects were presented with a challenging cooperative response. In addition, a reliable age effect was found indicating that the older subject group (10–12 years old) was more cooperative than the younger two age groups (5–7 and 8–10 years old). Finally, a significant game condition x order interaction was discovered suggesting that under some conditions the order in which the games were played affected the degree of subject cooperation. Results are related to a theory of competence motivation. It is argued that cooperation among American children may be increased if the task involves the presence of challenge. A portion of this research was presented at the biennial meetings of the Society for Research in Child Development, Detroit, Michigan, 1983.  相似文献   
828.
This study examined coworker attributes as potential correlates to the perceptions of older workers' job performance. It was found that increased education, more positive attitudes toward retirement, and experience working with older workers might lead to more positive perceptions of older workers' job performance.  相似文献   
829.
830.
The effects of a variable-ratio schedule of reinforcement on pedaling a stationary exercise bicycle were examined. Three obese and three nonobese 11-year-old boys were individually tested five times weekly for approximately 12 weeks. A changing-criterion design was used in which each successive criterion was increased over mean performance rate in the previous phase by approximately 15%. The contingencies of the successive criteria resulted in systematic increases in rate of exercise for all children. Final variable-ratio rates were higher than those under fixed ratios found in previous research, with rates for 2 of the 3 obese boys approximating those of the nonobese.  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