全文获取类型
收费全文 | 56196篇 |
免费 | 2191篇 |
国内免费 | 24篇 |
出版年
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.
Relative effectiveness of three stimulus variables for locating a moving sound source 总被引:1,自引:0,他引:1
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.
David E. Sandberg Anke A. Ehrhardt Claude A. Mellins Susan E. Ince Heino F. L. Meyer-Bahlburg 《Sex roles》1987,16(11-12):649-668
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.
SEX DIFFERENCES IN MORAL JUDGMENTS? A TEST OF GILLIGAN'S THEORY 总被引:1,自引:0,他引:1
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