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   76039篇
  免费   2336篇
  国内免费   32篇
  2020年   695篇
  2019年   838篇
  2018年   4330篇
  2017年   3663篇
  2016年   3297篇
  2015年   1052篇
  2014年   1143篇
  2013年   5115篇
  2012年   2403篇
  2011年   4236篇
  2010年   3544篇
  2009年   2574篇
  2008年   3389篇
  2007年   3772篇
  2006年   1646篇
  2005年   1707篇
  2004年   1624篇
  2003年   1439篇
  2002年   1441篇
  2001年   1879篇
  2000年   1757篇
  1999年   1376篇
  1998年   764篇
  1997年   674篇
  1996年   600篇
  1995年   580篇
  1994年   558篇
  1993年   583篇
  1992年   1081篇
  1991年   1019篇
  1990年   999篇
  1989年   877篇
  1988年   847篇
  1987年   836篇
  1986年   846篇
  1985年   905篇
  1984年   713篇
  1983年   624篇
  1982年   504篇
  1979年   691篇
  1978年   535篇
  1976年   493篇
  1975年   629篇
  1974年   661篇
  1973年   621篇
  1972年   554篇
  1971年   501篇
  1968年   571篇
  1967年   552篇
  1966年   505篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
Using both cross-sectional and longitudinal data spanning a decade, this article analyzes how dietary behavior of household children and adults (N = 576 households) was affected by the Stanford Five-City Project (FCP). Tests of a three-part, cumulative model of bidirectional influences within the family, which conceptualizes household members as sources of influence on each other and subject to influence by an external agent, were supported. Children and adults were influenced by both each other and the FCP campaign in changing and maintaining health behaviors. This article demonstrates that public health campaigns can be made more effective if they conceptualize both children and adults as potential sources of influence. The long-term effectiveness of such efforts can be enhanced by encouraging families, as opposed to individuals, to change health behaviors.  相似文献   
73.
The present study examined the relation between adolescents’ beliefs, emotions, and intentional behaviors toward two immigrant groups from the Spanish context: Moroccans and Ecuadorians. For this purpose, we tested the SCM/BIAS Map predictions considering the three-dimensional perspective of stereotype content, which distinguishes between morality, sociability, and competence. Spanish adolescents (N = 231, Mage = 15.39, SD = 1.09) evaluated either Moroccans (n = 114, 55.3% girls) or Ecuadorians (n = 117, 59% girls) on the SCM/BIAS Map variables. Our results confirmed, for both groups, the validity of the three-dimensional model of stereotype content and showed that adolescents differentiate between the two subdimensions of warmth and treat them as independent in intergroup evaluations. Furthermore, the mediating role of emotions in the stereotype content-behavior link was also confirmed but only for the univalent emotions in both groups. Finally, only morality acted as a consistent predictor of adolescents active behavioral intentions. The higher perceived morality of the immigrants increased adolescents’ admiration toward them, which in turn led adolescents to manifest more active facilitation intentions. Likewise, the perceived morality of the immigrants negatively affected adolescents’ contempt toward them, which in turn decreased adolescent's active harm intentions toward Ecuadorians and Moroccans. These findings indicate that the perceived morality of the outgroup is the key aspect in order to simultaneously promote helping behavior and decrease harmful one toward immigrant groups during adolescence.  相似文献   
74.
Drawing on terror management theory (TMT), we discuss the psychological motivations that shape personality at two levels: the characteristically human personality common to us all and the individual differences that distinguish some people from others. TMT posits that the motivation to protect the self against deep-rooted fears about mortality drives people to maintain meaningful, reliable conceptions of reality and positive evaluations of themselves, two broad tendencies that form the foundation of every person’s personality. We review studies showing that mortality reminders increase efforts to bolster cultural sources of meaning and self-esteem in similar ways across individuals and cultures. TMT also posits that individual differences in personality partly reflect the different sources of meaning and self-esteem that people invest in to assuage mortality fears. We review evidence that individual differences predict the degree and direction of people’s defensive responses to mortality reminders. Directions for future research are discussed.  相似文献   
75.
Pregnancy reflects a common experience for women in today's workforce, yet recent data suggest that some women scale back or leave the workforce following childbirth. Considering these effects on women's careers, researchers have sought to understand the underlying dynamics of these decisions. Here, we explore a paradoxical reason for weakened postpartum career attitudes: help that women receive during pregnancy. We integrate stereotype threat and benevolent sexism theories to explain how the effects of help on postpartum intentions to quit may be transmitted through reductions in work self-efficacy. In doing so, we consider the role of perceived impact—or the extent to which help interferes with versus enables women's perceived ability to continue performing their work role. Results of a weekly diary study of 105 pregnant employees suggest that work-interfering help led to decreased self-efficacy for work during the following week. Furthermore, there was an indirect effect of average help received at work during pregnancy on postpartum intentions to quit the workforce through reductions in work self-efficacy that was stronger insofar as help was work-interfering versus work-enabling. Taken together, our results highlight unintended negative consequences that occur when others provide ineffective support to women at work during pregnancy.  相似文献   
76.
The current study hypothesized that (1) hope would negatively predict burdensomeness, thwarted belongingness, and acquired capability to enact lethal injury; (2) hope would negatively predict suicidal ideation; and (3) the interpersonal suicide risk factors would predict suicidal ideation. Results indicated that hope negatively predicted burdensomeness and thwarted belongingness, but positively predicted acquired capability to enact suicide. Contrary to our second hypothesis, hope did not predict suicidal ideation, but interpersonal risk factors for suicide predicted suicidal ideation. Results are discussed in terms of implications for hope theory and Joiner's (2005) interpersonal risk factors for suicide, and for clinical practice.  相似文献   
77.
78.
Even though it can be shown that verbal knowledge of results (KR) is redundant with sensory feedback for learning certain motor skills, such findings do not eliminate the possibility that when KR is available it influences underlying learning processes. In order to examine the function of KR more closely, two experiments were designed in which the subjects received conflicting information about their own sensory feedback and the KR presented by the experimenter. In Experiment 1, two erroneous-KR groups, a correct-KR group, and a no-KR group performed 150 practice trials on a simple anticipation timing task and then performed three no-KR retention tests of 30 trials each following intervals of 10 minutes, 1 week, and 1 month. The results supported previous findings that providing correct KR is redundant in anticipation tasks. However, learning was influenced by KR as subjects performed according to the erroneous KR information, thereby ignoring their sensory feedback even after a 1-month interval. In Experiment 2, subjects practised a more complex striking response for the anticipation task for 75 trials and then performed no-KR retention trials either immediately, or 1 day or 1 week later. One of the groups received erroneous KR after 50 practice trials with correct KR. The results confirmed and extended those from Experiment 1, as erroneous KR, even after initial practice with correct KR, influenced retention performance. These results indicate that although KR provides information that is not needed to learn anticipation timing skills, this augmented verbal information is a dominant source of information that influences underlying cognitive processes involved in learning motor skills.  相似文献   
79.
80.
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