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   33720篇
  免费   1359篇
  国内免费   8篇
  2019年   446篇
  2018年   578篇
  2017年   605篇
  2016年   602篇
  2015年   431篇
  2014年   547篇
  2013年   2504篇
  2012年   1004篇
  2011年   1073篇
  2010年   628篇
  2009年   623篇
  2008年   915篇
  2007年   918篇
  2006年   861篇
  2005年   770篇
  2004年   752篇
  2003年   685篇
  2002年   721篇
  2001年   1064篇
  2000年   967篇
  1999年   750篇
  1998年   399篇
  1997年   318篇
  1996年   311篇
  1992年   560篇
  1991年   564篇
  1990年   551篇
  1989年   551篇
  1988年   542篇
  1987年   508篇
  1986年   536篇
  1985年   583篇
  1984年   459篇
  1983年   440篇
  1982年   365篇
  1981年   342篇
  1979年   527篇
  1978年   391篇
  1977年   316篇
  1976年   366篇
  1975年   444篇
  1974年   493篇
  1973年   522篇
  1972年   418篇
  1971年   385篇
  1970年   391篇
  1969年   416篇
  1968年   499篇
  1967年   430篇
  1966年   429篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
This study was designed to assess the accuracy of perceived levels of body fatness as indicated by 11- and 12-year-old children. Using a rating scale ranging from 1 (extremely lean) through 9 (extremely overweight), 50 males and 50 females estimated personal levels of body fatness. Using a 2 × 2 between-and-within-groups ANOVA, these estimates were compared to individual skinfold sum percentile scores derived from comparisons with national skinfold norms. The results revealed that the females tended to overestimate personal levels of body fatness, whereas estimates given by the male subjects were interpreted as not significantly different from skinfold sum percentile scores.  相似文献   
122.
Although peers' and teachers' evaluations of children's prosocial behavior and peers' sociometric ratings frequently have been used in studies of social development, the validity of young children's ratings of others has been questioned, as has that for teachers' ratings of prosocial behavior. In this study, preschoolers' ratings of peers' sociometric status and prosocial behavior, as well as teachers' ratings of children's prosocial dispositions, were obtained. These were correlated with children's naturally occurring prosocial or social behavior; ratings of prosocial behavior also were correlated with children's prosocial moral reasoning and prosocial self-attributions. Peers' sociometric ratings were positively related to children's sociability whereas prosocial ratings were related to helping (but not sharing) behavior. Teachers' ratings of prosocial behavior were not related to frequency of prosocial behaviors, but were positively related to developmentally mature moral judgments and self-reported motives.  相似文献   
123.
Tobacco, alcohol, and drug use are problems for American-Indian people. We reviewed these problems and the explanations for them and described a bicultural competence skills approach for preventing substance abuse with American-Indian adolescents. Data from a study of that approach suggest its efficacy with American-Indian youth. At posttest and a 6-month follow-up, American-Indian subjects who received preventive intervention based on bicultural competence skills concepts improved more than did American-Indian subjects in a no-intervention control condition on measures of substance-use knowledge, attitudes, and interactive skills, and on self-reported rates of tobacco, alcohol, and drug use. Our findings have implications for future substance-abuse prevention research with American-Indian people.  相似文献   
124.
The present study demonstrates the safety and effectiveness of an outpatient program designed to respond to adolescent-precipitated crises by mobilizing and restructuring the family's kinship system. Families of 75 adolescents at risk for hospitalization were followed up to 24 months after treatment with Systemic Crisis Intervention. Measures of offspring and family functioning, suicidal behavior, institutional use, and treatment costs are presented. Results clearly demonstrate the safety, effectiveness, and economic viability of Systemic Crisis Intervention.  相似文献   
125.
126.
Depressed affect and time perception   总被引:1,自引:0,他引:1  
  相似文献   
127.
128.
129.
130.
The startle probe response: a new measure of emotion?   总被引:17,自引:0,他引:17  
  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