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   26154篇
  免费   994篇
  国内免费   12篇
  27160篇
  2020年   323篇
  2019年   309篇
  2018年   529篇
  2017年   548篇
  2016年   557篇
  2015年   368篇
  2014年   488篇
  2013年   2165篇
  2012年   808篇
  2011年   863篇
  2010年   535篇
  2009年   504篇
  2008年   742篇
  2007年   724篇
  2006年   642篇
  2005年   565篇
  2004年   546篇
  2003年   511篇
  2002年   538篇
  2001年   764篇
  2000年   825篇
  1999年   602篇
  1998年   286篇
  1997年   245篇
  1993年   228篇
  1992年   471篇
  1991年   425篇
  1990年   452篇
  1989年   432篇
  1988年   407篇
  1987年   411篇
  1986年   416篇
  1985年   425篇
  1984年   346篇
  1983年   309篇
  1982年   251篇
  1979年   400篇
  1978年   286篇
  1977年   262篇
  1976年   227篇
  1975年   352篇
  1974年   378篇
  1973年   357篇
  1972年   338篇
  1971年   293篇
  1970年   270篇
  1969年   325篇
  1968年   362篇
  1967年   326篇
  1966年   332篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
Women are more intolerant of hate speech than men. This study examined relationality measures as mediators of gender differences in the perception of the harm of hate speech and the importance of freedom of speech. Participants were 107 male and 123 female college students. Questionnaires assessed the perceived harm of hate speech, the importance of freedom of speech, empathy, relational and collective interdependence, and connected and separate ways of knowing. Gender differences were found for the harm of hate speech, freedom of speech, empathy, and separate learning as a way of knowing. Women were more negative regarding the harm of hate speech and regarded freedom of speech as less important than men. Additionally, the perceived harm of hate speech was positively associated with empathy, connected knowing, and interdependence, and freedom of speech was positively associated with separate learning and negatively with empathy. Empathy mediated gender differences in the perceived harm of hate speech, and separate learning mediated gender differences in the importance of freedom of speech.  相似文献   
2.
OBJECTIVE: To test a theoretical model of how ethnic pride and self-control are related to risk and protective factors. DESIGN: A community sample of 670 African American youth (mean age = 11.2 years) were interviewed in households. MAIN OUTCOME MEASURES: Measures of cigarette smoking, alcohol use, and sexual behavior (lifetime to past month). RESULTS: Structural modeling analyses indicated parenting was related to self-control and self-esteem, and racial socialization was related to ethnic pride. Self-control and self-esteem variables were related to levels of deviance-prone attitudes and to perceptions of engagers in, or abstainers from, substance use and sexual behavior. The proximal factors (behavioral willingness, resistance efficacy, and peer behavior) had substantial relations to the criterion variables. Participant gender and parental education also had several paths in the model. Results were generally similar for the 2 outcome behaviors. CONCLUSIONS: In this population, self-esteem and self-control are related to parenting approaches and have pathways to attitudes and social perceptions that are significant factors for predisposing to, or protecting against, early involvement in substance use and sexual behavior.  相似文献   
3.
4.
Subjects in five experiments read nine-digit memory lists from a cathode ray tube for immediate recall. Reading aloud always produced a localized and reliable advantage for the last item, compared to reading silently. Two experiments on whispered and mouthed lists, with or without simultaneous broadband noise, falsified expectations derived from the theory of precategorical acoustic storage. Three additional experiments showed no enhancement of recency in the silent conditions when the digits were drawn or spelled gradually on the screen, a result that is inconsistent with the changing-state hypothesis. The classic auditory-visual modality effect is large and reliable, but still poorly understood.  相似文献   
5.
This study evaluated cardiovascular responses (CVR) to an active speech task with blatantly discriminatory (BRC) versus neutral (NRC) stimuli and an anger recall task in a sample of Black men (N = 73; age 18 to 47). Diastolic blood pressure scores were higher for NRC versus BRC stimuli during anger recall (p = .05). Moreover, persons in the NRC group who perceived high levels of racism (vs. no racism or BRC group) during active speech showed larger increases in blood pressure across postspeech rest, anger recall, and subsequent rest (p = .03). The notable elevation in CVR in response to an ambiguous event extends current models of racism suggesting that subtle racism is a psychosocial stressor that erodes health through chronically elevated CVR.  相似文献   
6.
7.
Rats' lever presses on a retractable lever earned brief presentations of discriminative stimuli signalling periods in which responding on an alternative lever was either non-reinforced (extinction) or reinforced on a random ratio schedule. The predictions of two theoretical accounts of this behaviour were tested by studying the effects of omitting either the stimulus signalling the reinforced or that signalling the non-reinforced schedule component. Under these conditions rats' behaviour is determined by the conditioned, affective properties of the stimuli rather than by their purely informational properties.  相似文献   
8.
9.
10.
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