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   56196篇
  免费   2191篇
  国内免费   24篇
  2020年   588篇
  2019年   749篇
  2018年   1036篇
  2017年   1130篇
  2016年   1156篇
  2015年   830篇
  2014年   994篇
  2013年   4450篇
  2012年   1776篇
  2011年   1811篇
  2010年   1147篇
  2009年   1097篇
  2008年   1567篇
  2007年   1610篇
  2006年   1408篇
  2005年   1275篇
  2004年   1195篇
  2003年   1159篇
  2002年   1193篇
  2001年   1746篇
  2000年   1680篇
  1999年   1308篇
  1998年   568篇
  1997年   547篇
  1996年   540篇
  1995年   518篇
  1992年   1107篇
  1991年   1015篇
  1990年   1048篇
  1989年   942篇
  1988年   996篇
  1987年   913篇
  1986年   931篇
  1985年   868篇
  1984年   759篇
  1983年   711篇
  1982年   529篇
  1979年   861篇
  1978年   626篇
  1977年   531篇
  1975年   691篇
  1974年   806篇
  1973年   839篇
  1972年   654篇
  1971年   633篇
  1970年   593篇
  1969年   621篇
  1968年   768篇
  1967年   695篇
  1966年   610篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
861.
862.
863.
864.
865.
Janice L. DeLucia 《Sex roles》1987,17(3-4):153-161
The influence of gender role identity on dating behaviors of college students was examined using the Bem Sex Role Inventory and a behavioral questionnaire constructed by the author. One hundred and ninety-seven students were classified as androgynous, undifferientated, feminine, or masculine based on their Bem Sex Role Inventory scores. A behavioral questionnaire was used to generate two self-report behavioral indexes: the masculine dating behavior and feminine dating behavior indexes. Results indicated that high-masculine individuals (androgynous and masculine individuals) scored higher on the masculine dating behavior index and that high-feminine individuals (androgynous and feminine individuals) scored higher on the feminine interactional index. The results of this study support the hypothesis that gender role identity influences self-reported dating behavior of college students.  相似文献   
866.
Two hundred and sixty three young adult college students responded to openended questions assessing their specific intentions, motives, and plans for having children. The most commonly stated motives for childbearing reflected a strong interest in establishing an identity and social network. Financial, marital, and emotional stability were identified as important factors influencing the timing of parenthood. Several significant sex differences were found for both motives and the timing of parenthood. These findings are discussed in terms of changing social norms regarding parenthood and changing sex role expectations.Portions of this research were presented at the Eastern Regional Psychological Association Convention in New York, April 1986. This research was funded by a grant from Trenton State College, Committee for Faculty and Institutional Research and Sabbatical Leave.  相似文献   
867.
A study is reported in which it is shown that observers can use at least three types of acoustic variables that indicate reliably when a moving sound source is passing: interaural temporal differences, the Doppler effect, and amplitude change. Each of these variables was presented in isolation and each was successful in indicating when a (stimulated) moving sound source passed an observer. These three variables were put into competition (with each indicating that closest passage occurred at a different time) in an effort to determine their relative importance. It was found that amplitude change dominated interaural temporal differences which, in turn, dominated the Doppler effect stimulus variable. The results are discussed in terms of two interpretations. First, it is possible that subjects based their judgements on the potential discriminability of each stimulus variable. However, because the stimuli used involved easily discriminable changes, subjects may instead have based their judgements on the independence of a stimulus variable from different environmental situation conditions. The dominance ordering obtained supports the second interpretation.  相似文献   
868.
The term pioneer is used for girls aspiring to male-dominated careers. This longitudinal study assesses the career choices of 68 middle-class girls during childhood (8–13 years, Phase I) and again during adolescence (13–18 years, Phase II), and investigates the relation between pioneering career choice and personal and family characteristics. Subjects were originally selected for exposure vs nonexposure to exogenous hormones during pregnancy. In childhood, pioneers were somewhat older, were more often persistent tomboys, had higher IQs, and had parents with higher educational attainment. In adolescence, paternal education was the only variable that showed the same relation to career choice. Adolescent girls who had wanted to get married at the time of the childhood assessment were now less likely to choose pioneering careers. Adolescent pioneers also had higher educational aspirations than nonpioneers and less likely anticipated being married within ten years than nonpioneers. A number of statistically borderline relationships were also observed: pioneers had somewhat fewer older brothers than nonpioneers, less often came from homes in which traditional femininity was stressed, and more frequently had mothers who had worked outside the home throughout their daughters' school years than mothers of nonpioneers. Prenatal exposure to exogenous sex hormones was not related to career choice during either childhood or adolescence.  相似文献   
869.
870.
3-6岁幼儿在分类实验中概括能力的发展   总被引:5,自引:0,他引:5  
本研究通过设计不同性质的分类实验,探讨3-6岁幼儿抽象概括能力的发展。我们根据年龄将幼儿分为四个组,每组80人,共320人。通过实验获得以下几点。①幼儿在各种不同性质的分类实验中可表现为四级不同的水平,如从根据表面的个别特征进行分类发展到根据内部的本质特征进行分类,从一维角度的分类发展到从两维角度来分类等。⑦达到各个水平的年龄不是截然划分的,而是互相交织的,随着年龄的增加,低级水平的人数不断减少,高级水平的人数不断增加。所以年龄阶段之间既有质的变化,又有量的变化。③对于不同性质的分类材料,各年龄所达到的概括水平也不同,分类材料的难度越大,概括水平越低。④儿童概括水平的高低受教育条件的影响。  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