全文获取类型
收费全文 | 2535篇 |
免费 | 67篇 |
出版年
2023年 | 16篇 |
2022年 | 18篇 |
2021年 | 17篇 |
2020年 | 44篇 |
2019年 | 43篇 |
2018年 | 55篇 |
2017年 | 65篇 |
2016年 | 56篇 |
2015年 | 33篇 |
2014年 | 54篇 |
2013年 | 270篇 |
2012年 | 91篇 |
2011年 | 112篇 |
2010年 | 73篇 |
2009年 | 65篇 |
2008年 | 101篇 |
2007年 | 87篇 |
2006年 | 91篇 |
2005年 | 86篇 |
2004年 | 89篇 |
2003年 | 79篇 |
2002年 | 99篇 |
2001年 | 42篇 |
2000年 | 43篇 |
1999年 | 45篇 |
1998年 | 38篇 |
1997年 | 31篇 |
1996年 | 41篇 |
1995年 | 47篇 |
1994年 | 38篇 |
1993年 | 35篇 |
1992年 | 28篇 |
1991年 | 37篇 |
1990年 | 26篇 |
1989年 | 34篇 |
1988年 | 31篇 |
1987年 | 26篇 |
1986年 | 29篇 |
1985年 | 35篇 |
1984年 | 36篇 |
1983年 | 35篇 |
1982年 | 30篇 |
1981年 | 37篇 |
1980年 | 18篇 |
1979年 | 33篇 |
1978年 | 23篇 |
1977年 | 21篇 |
1976年 | 20篇 |
1975年 | 19篇 |
1973年 | 17篇 |
排序方式: 共有2602条查询结果,搜索用时 78 毫秒
1.
2.
Linda J Koenig Sherri L Pals Tim Bush Melody Pratt Palmore Dale Stratford Tedd V Ellerbrock 《Health psychology》2008,27(2):159-169
OBJECTIVE: Compare the efficacy of a multicomponent social support intervention to standard-of-care counseling on medication adherence among HIV-infected patients initiating antiretroviral therapy. DESIGN: Randomized controlled trial. Generalized estimating equations tested for differences in the percentage of participants achieving 90% adherence. MAIN OUTCOME MEASURES: Pill-taking, electronically monitored over 6 consecutive months; plasma viral load (VL), assessed at 3 and 6 months following initiation of therapy. RESULTS: Of 226 participants who were randomized and began the trial, 87 (38%) were lost to the study by 6 months. The proportion of adherent participants declined steadily over time, with no time by group interaction. Sustained adherence was associated with increased odds of achieving an undetectable VL (OR=1.78; 95% CI=1.01, 3.13). In intention-to-treat analyses, a larger proportion of the intervention group than the control group was adherent (40.15% vs. 27.59%, p=.02) and achieved an undetectable VL p=.04). However, the majority of participants who remained on study experienced some reduction in VL (>or=1-log drop or undetectable), regardless of experimental condition. CONCLUSION: The multicomponent social support intervention significantly improved medication adherence over standard-of-care counseling; evidence for improved virologic outcomes was inconsistent. Early discontinuation of care and treatment may be a greater threat to the health of HIV patients than imperfect medication-taking. 相似文献
3.
4.
5.
Noelle Yuen Naleen Andrade Linda Nahulu George Makini John F. McDermott George Danko Ronald Johnson Jane Waldron 《Suicide & life-threatening behavior》1996,26(1):27-36
Native Hawaiian high school students, N = 1779, were surveyed for symptoms of psycho-pathology and suicide attempts in the previous 6 months. Seventy-seven (4.3%) of the students reported making a suicide attempt. There were no significant differences in prevalence rates for males and females. Depression, anxiety, aggression, substance abuse symptoms, and low family support, but not peer support, were significantly correlated with suicide attempts. On logistic regression, depression, substance abuse, and family support independently predicted attempts. The lack of gender difference may indicate a cultural characteristic of the Hawaiian population that differentiates it from mainstream American populations but likens it to the Native American population. 相似文献
6.
7.
8.
9.
Marvin W. Kahn Linda Lejero Marion Antone Dorene Francisco Jerome Manuel 《American journal of community psychology》1988,16(3):369-379
The status of a fully indigenous mental health program serviced and controlled by the Tohono O'odham (Papago) Indian tribe is reviewed from the perspective of its 17-year history. The program functions in large measure in a crisis intervention model, with suicidal or acutely disturbed cases being most frequent. However, a whole range of disorders and ages are seen. Traditional Medicine Men and Women are often used as consultants, as are some professionals. In recent years child sex abuse and abuse of drugs among youth are prominent problems. The program experienced problems of obtaining services off reservations for patients in need, and in establishing credibility of the Indian Mental Health workers with the outside service providers. 相似文献
10.
Past research in referential communication has indicated normally developing children show developmental progression in ability to communicate a specific referent to a listener. In one paradigm subjects were given lists of word-pairs in which one member of each pair was designated as the referent. It was shown that communicating about referents found in word-pairs associated in some way was more difficult than communicating about referents in dissimilar word-pairs. The present study extended this methodology to learning-disabled children. Learning-disabled, language-learning-disabled, and normally achieving children were asked to communicate about 30 pictured referents on three different tasks. On Tasks 1 and 2 each subject was asked to give a clue for the referent that would distinguish it from the other picture. Stimuli for Task 1 were 30 pairs of pictures that were related in some way and the stimuli for Task 2 were 30 pairs of unrelated pictures. Task 3 required the subjects to evaluate the adequacy of the examiner's clues for Task 1 stimuli. The disabled subjects were matched to the normally achieving subjects on the basis of receptive vocabulary age. Few differences were noted among the groups' performances on these referential communication tasks. Implications include the importance of vocabulary and concept development to referential communication. 相似文献