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   23659篇
  免费   950篇
  国内免费   32篇
  2020年   291篇
  2018年   319篇
  2017年   428篇
  2016年   433篇
  2015年   296篇
  2014年   369篇
  2013年   1929篇
  2012年   643篇
  2011年   661篇
  2010年   445篇
  2009年   445篇
  2008年   582篇
  2007年   556篇
  2006年   521篇
  2005年   459篇
  2004年   440篇
  2003年   408篇
  2002年   458篇
  2001年   728篇
  2000年   747篇
  1999年   555篇
  1998年   264篇
  1996年   239篇
  1993年   223篇
  1992年   484篇
  1991年   441篇
  1990年   476篇
  1989年   436篇
  1988年   413篇
  1987年   412篇
  1986年   420篇
  1985年   424篇
  1984年   337篇
  1983年   302篇
  1982年   250篇
  1981年   229篇
  1979年   406篇
  1978年   299篇
  1977年   273篇
  1976年   227篇
  1975年   355篇
  1974年   373篇
  1973年   360篇
  1972年   335篇
  1971年   300篇
  1970年   267篇
  1969年   330篇
  1968年   365篇
  1967年   327篇
  1966年   332篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
In an early study in the Journal of Applied Behavior Analysis, Rekers and Lovaas (1974) evaluated the Behavioral Treatment of Deviant Sex-role Behaviors in a Male Child. They investigated the use of reinforcement and punishment to target non-gender-conforming behaviors of a 5-year-old male child. This study was considered by some to be controversial and concerning, even near the time of publication (Nordyke et al. 1977; Winkler, 1977). The concerns focused on the ethicality of selecting non-gender-conforming behavior as a target response and the use of punishment for this type of response, particularly at the behest of parents when the young child was not seemingly distressed. The study has subsequently been used as empirical support for conversion therapy creating concerns about misinterpretation of the original article and harm to the LGBTQ+ community. This editorial reviews the concerns originally presented by Nordyke et al. (1977) and Winkler (1977) and issues an official Expression of Concern about the various harms that have been associated with this paper.  相似文献   
3.
There is substantial evidence of detrimental psychological sequelae following disasters, including terrorist attacks. The effect of these events on extreme responses such as suicide, however, is unclear. We tested competing hypotheses about such effects by employing autoregressive integrated moving average techniques to model the impact of September 11 and the Oklahoma City bombing on monthly suicide counts at the local, state, and national level. Unlike prior studies that provided conflicting evidence, rigorous time series techniques revealed no support for an increase or decrease in suicides following these events. We conclude that while terrorist attacks produce subsequent psychological morbidity and may affect self and collective efficacy well beyond their immediate impact, these effects are not strong enough to influence levels of suicide mortality.  相似文献   
4.
Evaluated the effect of varied physician affect on subject recall, anxiety, and perceptions in a simulated tense and ambiguous medical situation. Forty women at risk for breast cancer viewed videotapes of an oncologist presenting--with either worried or nonworried affect--mammogram results. Although the mammogram results and the oncologist were the same in both presentation, analyses indicated that, compared to the women receiving the results from a nonworried physician, the women receiving the results from a worried physician recalled significantly less information, perceived the clinical situation as significantly more severe, reported significantly higher levels of state anxiety, and had significantly higher pulse rates. These results suggest that physician affect plays a critical role in patient reaction to medical information. Implications for compliance research, patient satisfaction, and physician training are discussed.  相似文献   
5.
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   
6.
7.
8.
9.
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   
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