全文获取类型
收费全文 | 77071篇 |
免费 | 3135篇 |
国内免费 | 49篇 |
出版年
2020年 | 856篇 |
2019年 | 1072篇 |
2018年 | 1520篇 |
2017年 | 1509篇 |
2016年 | 1617篇 |
2015年 | 1087篇 |
2014年 | 1344篇 |
2013年 | 6492篇 |
2012年 | 2438篇 |
2011年 | 2582篇 |
2010年 | 1538篇 |
2009年 | 1600篇 |
2008年 | 2310篇 |
2007年 | 2278篇 |
2006年 | 2036篇 |
2005年 | 1813篇 |
2004年 | 1792篇 |
2003年 | 1613篇 |
2002年 | 1680篇 |
2001年 | 2488篇 |
2000年 | 2428篇 |
1999年 | 1849篇 |
1998年 | 925篇 |
1997年 | 818篇 |
1996年 | 752篇 |
1995年 | 764篇 |
1993年 | 743篇 |
1992年 | 1475篇 |
1991年 | 1398篇 |
1990年 | 1366篇 |
1989年 | 1254篇 |
1988年 | 1235篇 |
1987年 | 1171篇 |
1986年 | 1179篇 |
1985年 | 1264篇 |
1984年 | 1019篇 |
1983年 | 894篇 |
1982年 | 732篇 |
1979年 | 1034篇 |
1978年 | 765篇 |
1976年 | 714篇 |
1975年 | 868篇 |
1974年 | 1001篇 |
1973年 | 983篇 |
1972年 | 875篇 |
1971年 | 765篇 |
1969年 | 718篇 |
1968年 | 904篇 |
1967年 | 859篇 |
1966年 | 776篇 |
排序方式: 共有10000条查询结果,搜索用时 218 毫秒
51.
52.
53.
54.
55.
56.
Gavin N. Rackoff Daniel W. Lagoni Mia F. Shoshany Nasreen A. Moursi Laura Hennefield 《The British journal of developmental psychology》2022,40(1):170-186
By roughly 6 years of age, children acquire the stereotype that men are more competent than women in science, technology, engineering, and mathematics (STEM), potentially leading to greater trust in scientific information provided by men. This study tested whether 3- to 8-year-old children differentially endorsed conflicting information about science and toys presented by male and female informants depicted as a ‘man’ and ‘woman’ (Exp1) or ‘scientists’ (Exp2). Children were expected to endorse toy testimony from gender-matched informants; thus, the key question concerned endorsement of science testimony. In Exp1 (N = 149), boys and girls showed a same-gender informant preference for toy testimony; however, girls endorsed the male informant's testimony more for science than for toys – but only when tested by a male experimenter. In Exp2 (N = 264), boys and girls showed a same-gender preference, irrespective of content. Findings suggest that STEM-related gender stereotypes might lead girls to trust scientific information presented by men over women in certain contexts. 相似文献
57.
58.
In this paper, we organize past and present theories and models of creativity by using a new conceptual framework—the creativity matrix—with the aim of highlighting the dimensions of creativity we know a lot about and those we tend to either ignore or find difficult to study. This matrix is formed by bringing together a developmental model of creativity (the 4 C's) and a structural one (the 5 A's). We start by briefly describing these two conceptual frameworks, and then, we proceed to exploring the matrix itself by describing how the 5 A's are dynamically organized at each “level” of the 4 C's. Importantly, our overview of the matrix is informed by existing models and concepts that address one of more of the C's and the A's. This gives us a unique opportunity to take stock of what has been studied so far and, toward the end, consider new avenues for the development of theory and research agendas within creativity studies. 相似文献
59.
Carol VanZile-Tamsen Maria Testa Lisa L Harlow Jennifer A Livingston 《Health psychology》2006,25(2):249-254
The current study was designed to gain a better understanding of the nature of the relationship between substance use and sexual risk taking within a community sample of women (N = 1,004). Using confirmatory factor analysis, the authors examined the factor structure of sexual risk behaviors and substance use to determine whether they are best conceptualized as domains underlying a single, higher order, risk-taking propensity. A 2 higher order factor model (sexual risk behavior and substance use) provided the best fit to the data, suggesting that these 2 general risk domains are correlated but independent factors. Sensation seeking had large general direct effects on the 2 risk domains and large indirect effects on the 4 first-order factors and the individual indicators. Negative affect had smaller, yet still significant, effects. Impulsivity and anxiety were unrelated to sexual health risk domains. 相似文献
60.
G. C. Preston 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1985,37(1):23-31
Rats' lever presses on a retractable lever earned brief presentations of discriminative stimuli signalling periods in which responding on an alternative lever was either non-reinforced (extinction) or reinforced on a random ratio schedule. The predictions of two theoretical accounts of this behaviour were tested by studying the effects of omitting either the stimulus signalling the reinforced or that signalling the non-reinforced schedule component. Under these conditions rats' behaviour is determined by the conditioned, affective properties of the stimuli rather than by their purely informational properties. 相似文献