全文获取类型
收费全文 | 17795篇 |
免费 | 678篇 |
国内免费 | 4篇 |
出版年
2019年 | 244篇 |
2018年 | 302篇 |
2017年 | 267篇 |
2016年 | 314篇 |
2015年 | 213篇 |
2014年 | 299篇 |
2013年 | 1463篇 |
2012年 | 519篇 |
2011年 | 559篇 |
2010年 | 345篇 |
2009年 | 368篇 |
2008年 | 473篇 |
2007年 | 522篇 |
2006年 | 477篇 |
2005年 | 403篇 |
2004年 | 428篇 |
2003年 | 389篇 |
2002年 | 392篇 |
2001年 | 476篇 |
2000年 | 532篇 |
1999年 | 369篇 |
1998年 | 237篇 |
1997年 | 181篇 |
1996年 | 191篇 |
1995年 | 186篇 |
1994年 | 167篇 |
1992年 | 293篇 |
1991年 | 303篇 |
1990年 | 311篇 |
1989年 | 294篇 |
1988年 | 283篇 |
1987年 | 245篇 |
1986年 | 260篇 |
1985年 | 278篇 |
1984年 | 208篇 |
1983年 | 223篇 |
1982年 | 178篇 |
1980年 | 168篇 |
1979年 | 263篇 |
1978年 | 230篇 |
1975年 | 224篇 |
1974年 | 250篇 |
1973年 | 284篇 |
1972年 | 228篇 |
1971年 | 213篇 |
1970年 | 168篇 |
1969年 | 197篇 |
1968年 | 250篇 |
1967年 | 243篇 |
1966年 | 210篇 |
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
11.
TIMOTHY F. MURPHY 《Journal of applied philosophy》1987,4(2):195-204
ABSTRACT In this essay the argument set forth by Michael Levin regarding the abnormality of homosexual behaviour is reviewed and criticized. Against his argument which holds that homosexual behaviour is abnormal because it constitutes an evolutionary aberration, I argue that Levin's and all similarly constructed arguments fail to show that evolutionary origins of sexual behaviour have any significant normative force. I contend that his notion of homosexuality is confused and that he fails to consider alternative methods of how homosexuality might have indeed served evolutionary adaptive purposes or been the result of surplus adaptations. I argue, too, that Levin's linking of unhappiness with homosexual behaviour is spurious and ill-supported. Consequently, I reject Levin's claims that public policy ought to do what it can to minimize the incidence of such behaviour. I argue by contrast that if happiness is the end of public policy decisions, then society ought to take what measures it can to protect persons in respect of their homosexual behaviour and identities. 相似文献
12.
Convergent and divergent stereo mechanisms were compared in their ability to recover structure from motion. Contrary to a recent result reported by Richards and Lieberman, no difference in their performance was found; both mechanisms appeared equally capable of supporting the perception of good structure from motion. Possible reasons for the disparate results are discussed. 相似文献
13.
Christopher D. Adams Anthony Dickinson 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1981,33(2):109-121
In two experiments, hungry rats were given instrumental lever-press training for an appetitive reinforcer and, in addition, were exposed to another type of food which was not contingent on lever pressing. In the first experiment, exposure to each type of food was on separate days, whereas in the second experiment rats were exposed to each type of food in strict alternation within each session. Subsequently, a food aversion was conditioned to the reinforcer for the experimental group and to the non-contingent food for the control group. In both experiments, animals with an aversion to the reinforcer responded less in an extinction test than animals with an aversion to the non-contingent food. Subsequent reacquisition tests confirmed that the aversion to the non-contingent food in the control group was of comparable strength with that to the reinforcer in the experimental group. The results were discussed in terms of whether the reinforcer is encoded in the associative structure set up by exposure to an instrumental contingency. 相似文献
14.
NORMAN R. F. MAIER 《Personnel Psychology》1970,23(4):455-461
15.
16.
17.
Abby C King Bess Marcus David Ahn Andrea L Dunn W Jack Rejeski James F Sallis Mace Coday 《Health psychology》2006,25(3):336-347
The authors used recursive partitioning methods to identify combinations of baseline characteristics that predict 2-year physical activity success in each of 3 physical activity interventions delivered in the multisite Activity Counseling Trial. The sample consisted of 874 initially sedentary primary care patients, ages 35-75 years, who were at risk for cardiovascular disease. Predictors of 2-year success were specific to each intervention and represented a range of domains, including physiological, demographic, psychosocial, health-related, and environmental variables. The results indicate how specific patient subgroups (e.g., obese, unfit individuals; high-income individuals in stable health) may respond differently to varying levels and amounts of professional assistance and support. The methods used provide a practical first step toward identifying clinically meaningful patient subgroups for further systematic investigation. 相似文献
18.
19.
20.
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