全文获取类型
收费全文 | 2520篇 |
免费 | 102篇 |
出版年
2021年 | 25篇 |
2020年 | 29篇 |
2019年 | 34篇 |
2018年 | 51篇 |
2017年 | 51篇 |
2016年 | 71篇 |
2015年 | 49篇 |
2014年 | 56篇 |
2013年 | 295篇 |
2012年 | 91篇 |
2011年 | 112篇 |
2010年 | 73篇 |
2009年 | 65篇 |
2008年 | 100篇 |
2007年 | 93篇 |
2006年 | 79篇 |
2005年 | 88篇 |
2004年 | 67篇 |
2003年 | 73篇 |
2002年 | 69篇 |
2001年 | 33篇 |
2000年 | 37篇 |
1999年 | 36篇 |
1998年 | 40篇 |
1997年 | 32篇 |
1996年 | 26篇 |
1995年 | 22篇 |
1994年 | 39篇 |
1993年 | 26篇 |
1992年 | 36篇 |
1991年 | 27篇 |
1990年 | 31篇 |
1989年 | 29篇 |
1988年 | 27篇 |
1987年 | 24篇 |
1986年 | 28篇 |
1985年 | 31篇 |
1984年 | 30篇 |
1983年 | 28篇 |
1982年 | 36篇 |
1981年 | 35篇 |
1980年 | 29篇 |
1979年 | 39篇 |
1978年 | 28篇 |
1977年 | 23篇 |
1976年 | 21篇 |
1975年 | 20篇 |
1973年 | 19篇 |
1968年 | 19篇 |
1966年 | 18篇 |
排序方式: 共有2622条查询结果,搜索用时 15 毫秒
41.
Summary In this outline no attempt has been made to prove survival, nor even to cite all of the more convincing types of cases, but to present in organized form some of the classes of evidence gathered by psychical research. During the eighty-odd years of organized research in this field, instances have been attested of apparitions which indirectly suggest the survival of personality.This article is an excerpt from one which appeared in theJournal of the American Society for Psychical Research, January, 1945, and is reprinted by permission of the author. 相似文献
42.
43.
44.
It has been observed that the number of different ways in which a graph withp points can be labelled isp! divided by the number of symmetries, and that this holds regardless of the species of structure at hand. In this note, a simple group-theoretic proof is provided.This work was supported by Grant MH 10834 from the National Institute of Mental Health. 相似文献
45.
A FREE OPERANT PROCEDURE WAS USED TO DETERMINE WHETHER OR NOT ONE RAT COULD DISCRIMINATE: (1) between the presence and absence of a second rat, and (2) between two other rats of the same species and sex. The subjects were four male Wistar rats. The discriminatory response was a bar press and food was used as reinforcement during training. Although there were wide individual differences in rate of learning, all subjects learned to make both discriminations. 相似文献
46.
This paper presents the results from an investigation of the true probability distributions of the range of rank totals. A procedure for generating an approximation to the true distributions is also given. A comparison of the results of this approximation with an extensive criterion of generated true and sample distributions, and with other approximations is indicated. Accurate estimates of the critical ranges necessary to reach significance at three commonly used alpha levels, where the number of judges and items is less than or equal to sixteen, are presented in tabular form. 相似文献
47.
Rick M. Gardner Russell Urrutia James Morrell Deborah Watson Susan Sandoval 《Cognitive development》1990,5(4)
Body size estimates of 69 children aged 5–13 years were obtained using a TV video methodology. Tasks included an adjustment procedure where children manipulated the width of their body image on a TV, and a discrete task, where they judged the accuracy of their TV image which was presented as either normal or distorted, that is, too wide or too thin. On the continuous task, judgments were more accurate on ascending trials where children had to increase the width of the image. On the discrete task, a signal detection analysis revealed older children were better in detecting size distortion in their images and that the differences were due to differences in the biological sensory system and not due to a bias to report that they were too fat or too thin. However, there were response bias differences between genders. Females were more likely to report size distortion with increasing age while males were less likely. 相似文献
48.
Mehrdad Kalantari Ph.D. William Yule Ph.D. Frances Gardner Ph.D. 《Journal of child and family studies》1993,2(2):97-108
Out of 228 Iranian preschool Martyrs' children whose behaviour adjustment in the nursery settings was screened using the Preschool Behaviour Checklist, 12 well adjusted, zero scorers were compared with 8 poorly adjusted, high scorers. Using the parent's Behaviour Checklist, high scorers showed significantly more problems at home than zero scorers. On the Malaise Inventory, mothers of high scorers showed poorer mental health than mothers of zero scorers. Home observations showed that mother-child interaction was more aversive in high scorers than in zero scorers. More mothers of zero scorers had remarried. 相似文献
49.
Frank P. Gruba-McCallister Ph.D. 《Journal of religion and health》1993,32(2):107-120
The debate regarding the unitary versus multiple nature of the human person is examined with special attention to the division between conscious and unconscious. The roots of the unconscious are traced to the experience of alienation or feeling divided within. An existential analysis is provided in order to shed light on the nature of the unconscious. The experience of feeling divided within is explained as a metaphor that is taken literally. An existential-phenomenological explanation of the unconscious is provided which preserves the essential unity of the human person. 相似文献
50.
The contents of 800 singles ads were examined. They were compared by the gender of the advertiser, the year of appearance (1991 and 1986), and the SES of the target readership (affluent and general). There were very few advertisers who listed themselves as black, so these ads were not included in the study. Gender differences were most important. Men were more likely to offer financial security and seek attractiveness. Women were more likely to offer attractiveness and seek financial security. The gender differences were in agreement with those reported for over a decade and from many geographical areas, although less than half of the advertisers mentioned either finances or attractiveness. Contrary to our hypotheses, the contents of mens' and womens' ads were more different in 1991 than they had been in 1986 and more in conformity with sexual stereotypes. Ads in a paper with an affluent readership were more likely to mention educational and financial status while ads in a paper with a readership throughout the metropolitan area were more likely to mention physical characteristics. 相似文献