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   5568篇
  免费   298篇
  国内免费   2篇
  2023年   59篇
  2022年   47篇
  2021年   69篇
  2020年   124篇
  2019年   172篇
  2018年   208篇
  2017年   220篇
  2016年   205篇
  2015年   177篇
  2014年   182篇
  2013年   595篇
  2012年   303篇
  2011年   330篇
  2010年   207篇
  2009年   207篇
  2008年   267篇
  2007年   261篇
  2006年   216篇
  2005年   189篇
  2004年   176篇
  2003年   177篇
  2002年   153篇
  2001年   75篇
  2000年   57篇
  1999年   56篇
  1998年   71篇
  1997年   62篇
  1996年   63篇
  1995年   45篇
  1994年   58篇
  1993年   42篇
  1992年   44篇
  1991年   43篇
  1990年   46篇
  1989年   24篇
  1988年   30篇
  1987年   29篇
  1986年   25篇
  1985年   47篇
  1984年   38篇
  1982年   45篇
  1981年   30篇
  1980年   41篇
  1979年   38篇
  1978年   36篇
  1977年   40篇
  1976年   35篇
  1975年   31篇
  1974年   22篇
  1973年   26篇
排序方式: 共有5868条查询结果,搜索用时 15 毫秒
191.
It is nearly universally agreed among commentators that according to Aristotle's account of voluntary action in the Nicomachean Ethics (NE), only voluntary actions are blameworthy. I argue for a qualified rejection of this assumption: some actions that Aristotle counts as blameworthy do not meet the criteria for voluntariness set out in NE 3.1. However, in NE 3.5 and elsewhere, one finds a broader conception of voluntary action, and it is true that, for Aristotle, an action must be voluntary on this broader conception in order to be blameworthy. While the narrow conception only counts actions that are under the agent's direct control as voluntary, the broader conception includes also actions that are under the agent's indirect control. The compresence of these two conceptions in the NE is not simply a matter of sloppiness on Aristotle's part. Rather, he has good philosophical reasons for employing both.  相似文献   
192.
We evaluated whether teaching tacts of images with or without backgrounds would affect acquisition during teaching and generality across untaught targets with four children diagnosed with autism spectrum disorder. Including backgrounds could slow acquisition but bolster generality across other media containing backgrounds, whereas removing backgrounds may improve acquisition but result in poorer generality. Overall, acquisition rates were similar across conditions for three children, although one child displayed consistently slower acquisition during the background condition. We rarely observed generality to untaught targets when programming extinction, but embedding differential reinforcement or teaching additional images with backgrounds led to equally successful outcomes irrespective of initial teaching conditions. Teaching with or without backgrounds may result in marginal differences in acquisition of teaching and untaught targets, especially when arranging supplemental procedures during tests for generality. We discuss the importance of intrasubject replication, considerations when testing for generality, and implications for practice.  相似文献   
193.
Vosgerau, Scopelliti, and Huh (2020) question the construct validity of the most commonly used measures of self‐control and argue that many studies that claim to be examining self‐control may in fact be examining something else. In this comment, we generalize this argument and propose that this criticism could be leveraged against many other areas of consumer research. Indeed, many studies fail to properly establish the construct validity of their measures. Consequently, they may not be examining the construct they purport to be studying, which can lead to unreliable and conflicting findings.  相似文献   
194.
Science and Engineering Ethics - This work describes the perceptions that Industrial Engineering students have regarding Colombian firms’ corporate social responsibility (CSR) practices. It...  相似文献   
195.
Behavioral activation (BA), an effective treatment for depression, has recently been receiving attention as a possible intervention for PTSD. BA interventions could be particularly useful in treating underserved populations (i.e., individuals with lower socioeconomic status). A literature search was conducted, which identified seven outcome studies that examined the effectiveness of stand‐alone BA treatment for individuals with PTSD. All studies identified for this brief review demonstrated clinically significant reductions in PTSD symptoms using BA as an intervention. A meta‐analysis of these few studies revealed a nonsignificant effect (Cohen's d = 0.713, p = .512) despite reporting an average symptom reduction of 25.8%. Other studies utilizing BA treatment for PTSD do so in tandem with other interventions and were excluded from analysis. This brief review summarizes the literature on the use of BA as a stand‐alone treatment for PTSD and suggests that future research seek to confirm the usefulness of BA as a potential treatment modality for mental health‐care providers treating individuals with PTSD.  相似文献   
196.
Language acquisition depends on the ability to detect and track the distributional properties of speech. Successful acquisition also necessitates detecting changes in those properties, which can occur when the learner encounters different speakers, topics, dialects, or languages. When encountering multiple speech streams with different underlying statistics but overlapping features, how do infants keep track of the properties of each speech stream separately? In four experiments, we tested whether 8‐month‐old monolingual infants (N = 144) can track the underlying statistics of two artificial speech streams that share a portion of their syllables. We first presented each stream individually. We then presented the two speech streams in sequence, without contextual cues signaling the different speech streams, and subsequently added pitch and accent cues to help learners track each stream separately. The results reveal that monolingual infants experience difficulty tracking the statistical regularities in two speech streams presented sequentially, even when provided with contextual cues intended to facilitate separation of the speech streams. We discuss the implications of our findings for understanding how infants learn and separate the input when confronted with multiple statistical structures.  相似文献   
197.
Research demonstrating that infants discriminate between small (e.g., 1 vs. 3 dots) and large numerosities (e.g., 8 vs. 16 dots) is central to theories concerning the origins of human numerical abilities. To date, there has been no quantitative meta‐analysis of the infant numerical competency data. Here, we quantitatively synthesize the evidential value of the available literature on infant numerosity discrimination using a meta‐analytic tool called p‐curve. In p‐curve the distribution of available p‐values is analyzed to determine whether the published literature examining particular hypotheses contains evidential value. p‐curves demonstrated evidential value for the hypotheses that infants can discriminate between both small and large unimodal and cross‐modal numerosities. However, the analyses also revealed that the published data on infants’ ability to discriminate between large numerosities is less robust and statistically powered than the data on their ability to discriminate small numerosities. We argue there is a need for adequately powered replication studies to enable stronger inferences in order to use infant data to ground theories concerning the ontogenesis of numerical cognition.  相似文献   
198.
Social Psychology of Education - A successful journey through higher education is, for many, a once in a lifetime opportunity for social mobility. Unfortunately, one notable feature of higher...  相似文献   
199.
200.
Applied Research in Quality of Life - This study identified associations between perceived neighborhood stress and adolescents’ perceptions of life satisfaction. African American adolescents...  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