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   4015篇
  免费   128篇
  2021年   37篇
  2020年   65篇
  2019年   60篇
  2018年   119篇
  2017年   104篇
  2016年   98篇
  2015年   66篇
  2014年   68篇
  2013年   313篇
  2012年   138篇
  2011年   119篇
  2010年   76篇
  2009年   92篇
  2008年   99篇
  2007年   106篇
  2006年   87篇
  2005年   85篇
  2004年   76篇
  2003年   59篇
  2002年   56篇
  2001年   127篇
  2000年   91篇
  1999年   78篇
  1996年   40篇
  1993年   43篇
  1992年   60篇
  1991年   68篇
  1990年   59篇
  1989年   56篇
  1988年   62篇
  1987年   58篇
  1986年   51篇
  1985年   59篇
  1984年   58篇
  1983年   46篇
  1982年   53篇
  1981年   41篇
  1979年   57篇
  1978年   58篇
  1977年   50篇
  1976年   45篇
  1975年   65篇
  1974年   60篇
  1973年   56篇
  1972年   50篇
  1971年   52篇
  1969年   37篇
  1968年   49篇
  1967年   60篇
  1966年   43篇
排序方式: 共有4143条查询结果,搜索用时 15 毫秒
231.
According to the orthodox view of Kant's philosophy of music, Kant is the founder of musical formalism, the view that music is pure, contentless form, and appreciated as such. On this orthodox view, Kant is an innovator in philosophy of music, though his views are confused and sometimes contradictory. Sometimes, we are told, Kant indicates that music is a fine art and sometimes that it is merely an agreeable art. None of the orthodox position is correct. Kant's views on music are familiar, even a little old fashioned for their time. His views are consistent. He believes that some music is fine art and that the fine arts are imitative arts. Imitative arts have content, and Kant believes that at least some music has content. Our views on Kant's philosophy of music ought to be thoroughly revised.  相似文献   
232.
233.
Previous work from our laboratory showed that intermittently re-exposing rats to reinforcement for lever pressing in a training (A) context, while eliminating lever pressing in a second (B) context, increased ABA renewal of lever pressing relative to rats that experienced only Context B during response elimination. In the current study, we replicated these procedures while assessing renewal in the presence of a novel context (i.e., ABC renewal). Unlike the findings described above, renewal was reduced in the group that experienced re-exposure to Context A during lever-press elimination relative to rats that experienced only Context B. These findings suggest that alternating between contexts associated with reinforcement and extinction during treatment reduces the probability that organisms will respond in novel contexts. These outcomes may be the result of discrimination and/or generalization processes. Moreover, this training procedure may offer a potential mitigation strategy for ABC renewal.  相似文献   
234.
235.
„Ethnoscience”︁ in the early 1960s provides a prototypical case of an elite specialty. With easy access to recognition, there was only a loose confederation, not at all the kind of tightly knit social network with a garrison worldview typifying revolutionary groups. Elite specialities both grow and dissolve more rapidly than revolutionary groups; they require less commitment, and concomitantly offer less resistance to competitors. Ethnoscience lacked a single leader and was never monolithic.  相似文献   
236.
Diazepam-induced impairment of a go-no go successive discrimination   总被引:1,自引:0,他引:1  
Diazepam (2.0 and 4.0 mg/kg, but not 1.0 mg/kg) administered in eight acquisition sessions significantly impaired the light-cued successive discrimination of male Sprague-Dawley rats. In two postdrug (vehicle) sessions, groups previously treated with the drug demonstrated good recovery in discrimination. An analysis of response components indicated that the impairment was due to the failure of drugged subjects to inhibit or withhold responses during the no go periods of the task. These findings are consistent with a "disinhibitory hypothesis" of drug impairment. The similarity of the present findings to those previously reported with chlordiazepoxide suggests that such effects are a generalized characteristic of the benzodiazepine class of drugs.  相似文献   
237.
Sex Roles - Although children start to adopt gender stereotypes by the age of three, there is less evidence about how early they start to sanction other children’s counter-stereotypical...  相似文献   
238.
239.
The main purpose of this study was to analyze the structure and content of real-life attributions, using these data to examine some important theoretical and empirical issues in attribution theory. The causal attributions examined came from free-response verbal protocols of explanations for marital separation of 29 males and 33 females living in New Zealand. Respondents gave causal importance weghts to the attributions from their verbal protocols, utilizing the technique of subjective magnitude estimation. Ipsative data, representing perceived causal responsibility for different attribution targets (self, ex-spouse, external factors, etc.), were derived from these weights, and the impact a range of independent variables exerted on these derived free-response attribution percentages was examined. Evidence is presented which supports the validity and reliability of this technique. The normative data gathered was found to be both consistent and inconsistent with different aspects of attribution theory. The implications for attribution theory are discussed.  相似文献   
240.
Data from experimental animals suggest that 5-hydroxytryptamine (5HT) may have an inhibitory effect on aggression, while clinical studies have found a correlation between pathological aggression and low brain 5HT. To investigate this relationship further we used amino acid mixtures designed to raise or lower the levels of the 5HT precursor, tryptophan. Normal male subjects were given tryptophan-depleted, balanced, or tryptophan-supplemented ammo acid mixtures and tested for aggression 5 hours later. The balanced amino acid mixture served as a control for the tryptophan depletion and supplementation. Testing for aggression was done using the Buss paradigm in which subjects deliver electric shocks to a (nonexistent) partner in response to stimulus tones. Duration and intensity of shock delivered were the measures of aggression, while responsivity to the stimulus tones was the measure of perceptual sensitivity. Neither tryptophan supplementation nor tryptophan depletion had any effect on these measures of aggression or perceptual sensitivity. We conclude that raising or lowering the synthesis of brain 5HT through alterations in tryptophan availability does not influence aggression in normal males as measured by the Buss task.  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