全文获取类型
收费全文 | 28906篇 |
免费 | 1826篇 |
国内免费 | 44篇 |
出版年
2018年 | 379篇 |
2017年 | 397篇 |
2016年 | 430篇 |
2015年 | 319篇 |
2014年 | 409篇 |
2013年 | 2191篇 |
2012年 | 684篇 |
2011年 | 732篇 |
2010年 | 570篇 |
2009年 | 628篇 |
2008年 | 758篇 |
2007年 | 685篇 |
2006年 | 621篇 |
2005年 | 541篇 |
2004年 | 598篇 |
2003年 | 591篇 |
2002年 | 574篇 |
2001年 | 762篇 |
2000年 | 712篇 |
1999年 | 607篇 |
1998年 | 357篇 |
1997年 | 357篇 |
1996年 | 388篇 |
1995年 | 329篇 |
1992年 | 597篇 |
1991年 | 559篇 |
1990年 | 540篇 |
1989年 | 515篇 |
1988年 | 521篇 |
1987年 | 475篇 |
1986年 | 510篇 |
1985年 | 488篇 |
1984年 | 438篇 |
1983年 | 371篇 |
1982年 | 316篇 |
1981年 | 324篇 |
1979年 | 464篇 |
1978年 | 358篇 |
1977年 | 317篇 |
1976年 | 343篇 |
1975年 | 381篇 |
1974年 | 474篇 |
1973年 | 514篇 |
1972年 | 407篇 |
1971年 | 420篇 |
1970年 | 380篇 |
1969年 | 406篇 |
1968年 | 497篇 |
1967年 | 448篇 |
1966年 | 484篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
Eric Stice Manuel Barrera Jr. Laurie Chassin 《Journal of abnormal child psychology》1993,21(6):609-629
Past research has generated inconsistent findings regarding the relation of parental control and support to adolescent problem behaviors. Using two waves of data collected 1 year apart, the current study examined the influence of parental control and support on adolescents' externalizing symptoms, alcohol use, and illicit substance use. A sample of adolescents and their parents (@#@ N =454) was studied, within which approximately half of the adolescents were at high risk because of parental alcoholism. Multipleregression analyses of crosssectional data showed a negative quadratic relation between parental control and adolescent externalizing symptomatology, and between parental control and adolescent illicit substance use. Parental control had a negative linear relation to adolescent alcohol use. Parental support showed a negative quadratic relation to adolescent illicit substance use, and negative linear relations to adolescent alcohol use and externalizing symptoms. Although longitudinally adjusted contemporaneous results were consistent with crosssectional findings, parental support and control were prospectively related only to adolescent alcohol use. The quadratic relations suggest that adolescents who receive either extreme of parental support or control are at risk for problem behaviors. 相似文献
962.
An experiment was conducted to examine the influence of the perceived extremity of a message and motivation to elaborate upon the process of persuasion. The first goal was to test a model of attitude change relating Social Judgment Theory to the Elaboration Likelihood Model. The second objective was to develop an instrument to measure attitude structure (latitudes of acceptance, non-commitment, and rejection) that allowed for a more refined assessment of the discrepancy between the position advocated in a message and the recipient's initial attitude. The main dependent variable was the attitude towards the use of automobiles in relation to environmental issues. Subjects were confronted with a message located in their own latitude of acceptance, rejection or non-commitment. Shortly after, a second measurement of attitude took place. The results showed that messages within the latitudes of non-commitment gave rise to the greatest attitude change. The data support the susceptibility hypothesis that subjects elaborate messages mainly in the latitude of non-commitment. 相似文献
963.
Job Satisfaction Among Ethnic Minorities in The Netherlands 总被引:1,自引:0,他引:1
964.
Parts and wholes in face recognition 总被引:25,自引:0,他引:25
James W. Tanaka Martha J. Farah 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》1993,46(2):225-245
Are faces recognized using more holistic representations than other types of stimuli? Taking holistic representation to mean representation without an internal part structure, we interpret the available evidence on this issue and then design new empirical tests. Based on previous research, we reasoned that if a portion of an object corresponds to an explicitly represented part in a hierarchical visual representation, then when that portion is presented in isolation it will be identified relatively more easily than if it did not have the status of an explicitly represented part. The hypothesis that face recognition is holistic therefore predicts that a part of a face will be disproportionately more easily recognized in the whole face than as an isolated part, relative to recognition of the parts and wholes of other kinds of stimuli. This prediction was borne out in three experiments: subjects were more accurate at identifying the parts of faces, presented in the whole object, than they were at identifying the same part presented in isolation, even though both parts and wholes were tested in a forced-choice format and the whole faces differed only by one part. In contrast, three other types of stimuli--scrambled faces, inverted faces, and houses--did not show this advantage for part identification in whole object recognition. 相似文献
965.
Women in advertisements in medical journals 总被引:1,自引:0,他引:1
To determine the images of women in picture advertisements, a stratified random sample of 32 medical journals, representing approximately 12% of medical journals published in the United States that are directed toward physicians in clinical practice, was subjected to content analysis. The sample consists of 209 different ads. The subjects of the ads included men, women, and children representing a variety of ethnic, racial, and socioeconomic groups. Notable, however, was the preponderance of Caucasian males pictured as physicians and the absence of women and people of color in this role. Women are pictured as 68.1% of consumers and men as 31.9%, a significant difference. Statistically significant differences also occur in the images of men and women as consumers. Most of the workers are men (68.2%), another significant difference. When women depicted are workers, they are secretaries and waitresses. Portrayals of women in medical advertisements continue to be stereotyped and outdated. 相似文献
966.
While much of the early research on the social perception of sexual assault focused on instances of stranger rape, recent work has indicated that acquaintance rape occurs much more frequently. The purpose of the present investigation was to examine a gender role socialization analysis of acquaintance rape. The subjects in the present investigation, predominately Caucasian-American females (i.e., over 90% were nonminority), were first preclassified as either traditional or nontraditional in their gender role views about women. We then examined their perception of rape victims and rape perpetrators as a function of whether the rape occurred between casual dating partners vs. long-term steady daters, and also as a function of whether the assailant exposed the rape victim to the disease AIDS (vs. no exposure to AIDS). The results indicated that individuals who varied in their stereotypic views about women differed in their reactions, with more traditional subjects being more likely to negatively evaluate the rape victim and less likely to evaluate the rapist in an unfavorable manner. In addition, it was found that when rape victims were exposed to AIDS, the social perceptions of others were strongly influenced, with casual-dating rape acquaintances being more likely to bear the onus of a negative reaction from others. 相似文献
967.
W. X. Schneider 《Psychological research》1993,56(1):35-43
Summary One of the functions of visual attention is the selection of object information. This seems to be in line with an influential group of attentional models that assume that attentional selection is space based. These models assume that the selection of an object in vision is realized by selection of the location of that object. Whether this relatively simple idea of space-based attention and the corresponding, more elaborated space-based models are sufficient to handle selected constraints and problems of object selection is the main issue of this article. The first step toward an answer is to describe the common computational structure of space-based attentional models. Two model classes will be distinguished: capacity-limited models (e.g., Treisman, 1988; LaBerge & Brown, 1989) and models that do not assume a capacity limitation (e. g., Van der Heijden, 1992). Next, three kinds of task and data on object selection are introduced that are especially challenging for space-based models. The first type of data refers to experiments that require selection between overlapping objects. The second type of data concerns the influence of early perceptual grouping - a strong object-defining factor- on late response competition, and the third type consists of a selection task in which a high-level (semantic) attribute defines an object and controls selection. In all three cases, problems of space-based models are analyzed and possible solutions are sketched. Finally, a brief evaluative summary is given. 相似文献
968.
969.
This study examines how gender is related to self-evaluations of information to discuss current social and political issues. The sample is one of predominantly white (96%) college graduates. Using alumni samples, we look at how members of four classes that span 20 years evaluate their knowledge to hold conversations on a variety of public affairs issues ranging from the Strategic Defense Initiative to government funding of abortion. We find gender differences, with men perceiving themselves more knowledgeable in conversations and women less so. We raise the possibility that they are “doing gender.” The implications of these findings are explored. 相似文献
970.
A W Inhoff 《Acta psychologica》1990,73(3):281-297
Eye movements and eye fixations were recorded to study the integration of letter/word information across interword fixations in reading. Two hypotheses were examined. One hypothesis posits that readers obtain effective information from the beginning two or three letters of a parafoveal word. This information facilitates the recognition of the word when it is being fixated. The alternative posits that effective information is obtained from the complete parafoveal word. The results of the present study showed faster reading rates when parafoveal previews comprised complete words than when they comprised beginning letters alone. Furthermore, the usability of parafoveally available partial word information from beginning and ending letters was not affected by small variations in retinal eccentricity. Both findings were taken as evidence that readers gain useful information from all letters of the parafoveally available word and that whole word information, rather than specific letter information, is integrated across interword fixations in reading. 相似文献