全文获取类型
收费全文 | 1534篇 |
免费 | 122篇 |
出版年
2023年 | 11篇 |
2022年 | 19篇 |
2021年 | 26篇 |
2020年 | 55篇 |
2019年 | 61篇 |
2018年 | 79篇 |
2017年 | 67篇 |
2016年 | 87篇 |
2015年 | 70篇 |
2014年 | 75篇 |
2013年 | 201篇 |
2012年 | 121篇 |
2011年 | 98篇 |
2010年 | 81篇 |
2009年 | 74篇 |
2008年 | 86篇 |
2007年 | 58篇 |
2006年 | 37篇 |
2005年 | 39篇 |
2004年 | 60篇 |
2003年 | 38篇 |
2002年 | 31篇 |
2001年 | 15篇 |
2000年 | 16篇 |
1999年 | 10篇 |
1998年 | 9篇 |
1997年 | 8篇 |
1996年 | 4篇 |
1995年 | 3篇 |
1994年 | 5篇 |
1993年 | 5篇 |
1992年 | 6篇 |
1991年 | 4篇 |
1990年 | 5篇 |
1988年 | 4篇 |
1986年 | 3篇 |
1984年 | 5篇 |
1983年 | 3篇 |
1982年 | 4篇 |
1981年 | 4篇 |
1980年 | 6篇 |
1979年 | 4篇 |
1978年 | 5篇 |
1976年 | 9篇 |
1975年 | 3篇 |
1974年 | 5篇 |
1973年 | 5篇 |
1970年 | 3篇 |
1968年 | 7篇 |
1966年 | 3篇 |
排序方式: 共有1656条查询结果,搜索用时 15 毫秒
21.
Daniel Steiner 《The Journal of medical humanities》1980,2(4):203-211
This memorandum was prepared by Daniel Steiner, General Counsel to Harvard University on behalf of the President's Office and distributed to the faculty in October, 1980. It reviews recent Harvard policy with regard to patents and technology transfer. Spurred by recombinant DNA research, at Harvard and elsewhere, benefits and pitfalls of the University's participation as a minor shareholder in a company engaged in research and development are identified. The author notes that “The memorandum has benefited from numerous discussions with members of the faculty and administration and in particular from the comments of President (Derek) Bok and Dean (Henry) Rosovsky.” 相似文献
22.
Adam Reeves 《Attention, perception & psychophysics》1980,28(2):118-124
Observers viewed briefly presented target dot patterns, either at low contrast without a mask (no mask, or NM) or at high contrast and followed by a long-lasting patterned mask (backward masking, or BM). Experiment 1 demonstrated independent processing of NM target dots but limited capacity processing of BM target dots. Experiments 2 and 3 showed that visual images may radically change sensitivity (d′) in BM but not in NM. Results suggest that d′ is reduced if the image suppresses dots relevant for the detection task, but that d′ is raised if the image suppresses dots that compete for processing with those the observer must detect. 相似文献
23.
In a study of 105 same-sex twin pairs, ages 7 to 10 years, maternal ratings on 23 bipolar scales yielded six factors designated as compliant morality, applied cognitive, sociability, emotionality, tough-mindedness, and activity-distractibility. Analyses by twin pairs (68 identical, 37 fraternal) indicated that correlations for identical pairs were significantly higher than fraternal pairs on all but one factor: tough-mindedness. Profile analyses for the six factors indicated that the profiles of scores across the factors were more concordant for the identical twin pairs. Correlations obtained from the individual scales produced differences between the identical and fraternal twin pairs as well. Overall, the data suggested that several components and the total organization of those components of personality and temperament are genetically influenced. 相似文献
24.
25.
26.
Trevor A. Hart Syed W. Noor Shayna Skakoon-Sparling Samer N. Lazkani Sandra Gardner Bob Leahy John Maxwell Rick Julien Scott Simpson Malcolm Steinberg Barry D. Adam 《Behavior Therapy》2021,52(1):1-14
Gay, bisexual, and other men who have sex with men (GBM) continue to have high rates of HIV and sexually transmitted infections, including syphilis. GBM have therefore been identified by public health agencies as a high-priority population to reach with prevention initiatives. Despite the importance of mental health in preventing HIV and related infections, there is a shortage of credentialed mental health professionals to deliver behavioral Counseling interventions. The current study evaluated the efficacy of GPS, a community-based and peer-delivered sexual health promotion motivational interviewing–based intervention for HIV-positive GBM who engaged in condomless anal sex (CAS) in the past 2 months. GPS prevention counseling demonstrated a 43% relative reduction at 3-month follow-up in CAS with serodiscordant partners and significant reductions in sexual compulsivity. The study demonstrated that community-based counselors can administer an efficacious motivational interviewing program, and suggests a continued benefit of counseling methods to promote the sexual health of higher risk populations. 相似文献
27.
Adam Pryor 《Dialog》2021,60(1):97-102
Responding to the analyses that Andreas Losch and Lucas John Mix offer regarding Living with Tiny Aliens: The Image of God for the Anthropocene, this article begins to address how their respective concerns regarding ratiocentric and anthropocentric ideas haunt the construction of a planetary account of the imago Dei. The article then introduces a subsequent line of critique not mentioned by Losch or Mix related to decentering the human individual from accounts of the imago Dei in order to highlight an ongoing challenge for transdisciplinary theological projects that involve astrobiology. 相似文献
28.
Motivation and Emotion - This study investigated the effects of current unsatisfactory performance (CUP) on improvement expectancy (IE) and commitment to improvement (CTI). 118 high school students... 相似文献
29.
Studia Logica - Through a series of examples, we illustrate some important drawbacks that the action model logic framework suffers from in its ability to represent the dynamics of information... 相似文献
30.
Sellers Christina M. Díaz-Valdés Antonia Porter Andrew C. Glenn Catherine R. Miller Adam Bryant Battalen Adeline Wyman O’Brien Kimberly H. McManama 《Journal of abnormal child psychology》2021,49(11):1503-1511
Research on Child and Adolescent Psychopathology - The purpose of this study was to understand the trajectories of nonsuicidal self-injury (NSSI) and suicide plans (SP) in the 90 days... 相似文献