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   16076篇
  免费   705篇
  国内免费   7篇
  2020年   182篇
  2019年   189篇
  2018年   276篇
  2017年   255篇
  2016年   298篇
  2015年   219篇
  2014年   286篇
  2013年   1179篇
  2012年   509篇
  2011年   472篇
  2010年   327篇
  2009年   302篇
  2008年   426篇
  2007年   445篇
  2006年   394篇
  2005年   384篇
  2004年   338篇
  2003年   297篇
  2002年   325篇
  2001年   682篇
  2000年   675篇
  1999年   460篇
  1998年   184篇
  1997年   174篇
  1996年   167篇
  1995年   146篇
  1992年   366篇
  1991年   342篇
  1990年   357篇
  1989年   303篇
  1988年   293篇
  1987年   285篇
  1986年   258篇
  1985年   258篇
  1984年   243篇
  1983年   208篇
  1982年   161篇
  1979年   223篇
  1978年   176篇
  1977年   152篇
  1975年   192篇
  1974年   237篇
  1973年   229篇
  1972年   185篇
  1971年   184篇
  1970年   151篇
  1969年   176篇
  1968年   213篇
  1967年   191篇
  1966年   156篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Playfulness is an individual differences variable at the trait-level. It describes the ability to experience or (re)frame everyday situations as stimulating, interesting, and/or entertaining. Playfulness in adolescents is understudied. We collected self-report data on four facets of playfulness (other-directed, lighthearted, intellectual, and whimsical) in two German-speaking samples of adolescents (N1 = 210, N2 = 270; age range 13–18 years). The facets correlated positively, but to varying degrees with life satisfaction (social life, self, friends) and intrinsic goals. There was no relationship with self-reported school grades and achievement goals (Sample 1). Playfulness in girls was associated with peer-nominated (classmates) bullying behaviors and victimization status (Sample 2). Overall, the findings show that playfulness has an impact on various domains of the life of adolescents. We discuss directions for further research in the field.  相似文献   
992.
Animal Cognition - Errors of source monitoring are widespread human memory challenges, and our memories are subject to distortion upon the presentation of subsequent misinformation. Less is known...  相似文献   
993.
994.
995.
Thirty-three twelve-month-old infants were divided into three groups based on the frequency and length of naturally-occurring nontraumatic separations from mother during the first year. One group had experienced only brief separations when left with a babysitter for an evening. A second group had been left once or twice for an average of five days while parents vacationed. A third group had been left regularly and frequently during the daytime, usually because mother was working. These groups were compared on measures of reaction to separation and reunion, in the home and in the laboratory, at one year of age. No group differences were found on any of the dependent variables. It is suggested that the quality of substitute care is probably more important than separation per se in mediating the impact of employment or daycare on infant development.  相似文献   
996.
A model was presented describing the reciprocal influence of disruptions in parent discipline practices on irritable exchanges between the target child and other family members. Disrupted parent discipline and irritable microsocial exchanges within the family were hypothesized to provide a basic training for aggression that generalizes to other settings such that the child is identified by peers, teachers, and parents as physically aggressive. Physical fighting was thought to lead to rejection by the normal peer group, which was hypothesized to feed back to further exacerbate fighting. Multilevel assessment including interview, questionnaires, laboratory studies, and home observations were carried out with the families of 91 preadolescent and adolescent boys. Nine indicators from the assessment battery were used to define the constructs Inept Parental Discipline, Negative Microsocial Exchanges, Physical Fighting, and Poor Peer Relations. Structural equations (LISREL VI) were used to describe the relations among the constructs. The t values for the path coefficients were significant. A chi-square analysis showed an acceptable fit between the model and the empirical findings. The findings were interpreted as being consistent with the hypothesis that under certain circumstances, family interaction may serve as basic training for aggression. In the present study, interactions with siblings in the home seemed to serve a pivotal role.  相似文献   
997.
998.
999.
1000.
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