全文获取类型
收费全文 | 1563篇 |
免费 | 64篇 |
出版年
2021年 | 10篇 |
2020年 | 23篇 |
2019年 | 26篇 |
2018年 | 37篇 |
2017年 | 48篇 |
2016年 | 39篇 |
2015年 | 31篇 |
2014年 | 27篇 |
2013年 | 174篇 |
2012年 | 56篇 |
2011年 | 54篇 |
2010年 | 34篇 |
2009年 | 36篇 |
2008年 | 57篇 |
2007年 | 58篇 |
2006年 | 60篇 |
2005年 | 52篇 |
2004年 | 48篇 |
2003年 | 51篇 |
2002年 | 76篇 |
2001年 | 34篇 |
2000年 | 32篇 |
1999年 | 36篇 |
1998年 | 32篇 |
1997年 | 27篇 |
1996年 | 18篇 |
1995年 | 13篇 |
1994年 | 23篇 |
1993年 | 24篇 |
1992年 | 27篇 |
1991年 | 18篇 |
1990年 | 19篇 |
1989年 | 16篇 |
1988年 | 20篇 |
1987年 | 21篇 |
1986年 | 12篇 |
1985年 | 15篇 |
1984年 | 25篇 |
1983年 | 17篇 |
1982年 | 14篇 |
1981年 | 15篇 |
1980年 | 17篇 |
1979年 | 16篇 |
1978年 | 24篇 |
1977年 | 10篇 |
1976年 | 18篇 |
1975年 | 13篇 |
1973年 | 9篇 |
1972年 | 8篇 |
1971年 | 6篇 |
排序方式: 共有1627条查询结果,搜索用时 15 毫秒
151.
A small group of humanitarian aid workers travelled to Port-au-Prince, Haiti six months after the 2010 earthquake to assist in recovery efforts at an orphanage. This study explores the experiences of these workers and how they coped with the challenges in Port-au-Prince. Participants kept a journal to record their daily experiences. A phenomenological methodology was used to analyse the data in this study. Themes included relationships and connections, faith/perspective, care of self and others, purpose, and perspective. Researchers concluded relief workers need more preparation and support during and after humanitarian trips as experiences significantly impact workers perspective of themselves and others. 相似文献
152.
153.
154.
Barnes LL Wilson RS de Leon CF Bennett DA 《Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition》2006,13(3-4):516-528
Research in older Caucasians has demonstrated that cognitive activity is related to cognitive function in late adulthood. Knowledge of this association is limited in older minority populations. We examined the relation of cognitive activity and access to cognitive resources, with cognitive function in a group of 108 older African Americans. We constructed two scales to measure the frequency of cognitive activity and the presence of resources that promote cognitive activity during early and late life. Both measures had high internal consistency and the cognitive activity scale had adequate temporal stability over a 4-week interval. In analyses that controlled for age and education, more frequent lifetime cognitive activity was related to current cognitive function, but lifetime cognitive resources only approached significance. The results suggest that both measures are psychometrically sound in a minority population and that lifetime cognitive activity may contribute to current cognitive function in African Americans. 相似文献
155.
Dressler LG Juengst ET 《The American journal of bioethics : AJOB》2006,6(6):18-20; author reply W10-2
156.
157.
Most of what we know about sexual abuse comes from efforts to examine female children victimized by men. Although some researchers have identified similarities between male and female victims of sexual abuse, few studies have examined gender-specific factors associated with sexual health practices among homeless adolescents. The aim of this study was to explore how gender and history of sexual abuse influence cognitive-perceptual and behavioral factors associated with sexual health practices of homeless adolescents. This study was a secondary analysis of data collected for a cross-sectional study of the sexual health practices of homeless adolescents. The sample consisted of 414 youths (104 males who reported sexual abuse and 124 who did not; and 95 females who reported sexual abuse and 75 who did not; 16 did not provide these data). Homeless adolescent females with a history of sexual abuse scored higher (indicating a shorter perspective) on a measure of future time perspective than females with no sexual abuse. Males who reported no sexual abuse scored higher than abused females on perceived health status and higher than abused males on assertive communication. With respect to perceived health status, males who reported no sexual abuse scored significantly higher than females who reported sexual abuse (p = .04). Males with no sexual abuse had significantly higher assertive communication scores than did males who had experienced sexual abuse (p = .015). We found that male and female abuse victims differ in terms of their cognitive-perceptual and behavioral factors associated with sexual health practices. Early identification of those who have been abused is critical so that interventions can be developed. Effective short-term interventions are needed for the adolescent victims of Child Sexual Abuse (CSA), particularly those who are homeless and prone to further sexual victimization. 相似文献
158.
Researchers previously have investigated the role of race in capital sentencing, and in particular, whether the race of the defendant or victim influences the likelihood of a death sentence. In the present study, we examined whether the likelihood of being sentenced to death is influenced by the degree to which a Black defendant is perceived to have a stereotypically Black appearance. Controlling for a wide array of factors, we found that in cases involving a White victim, the more stereotypically Black a defendant is perceived to be, the more likely that person is to be sentenced to death. 相似文献
159.
Neely LC Lakey B Cohen JL Barry R Orehek E Abeare CA Mayer W 《Journal of personality》2006,74(4):1015-1046
This study investigated the extent to which the link between perceived social support and affect reflected support recipients' trait perceived support as well as three distinct social processes: the objective supportiveness of providers, the unique relationships among recipients and providers that were stable over occasions, as well as the unique relationships that varied across occasions. Ten recipients interacted with each of the same four providers on five separate occasions, for a total of 200 interactions. Recipients and independent observers rated recipient affect and provider support. Greater perceived support was related to greater positive affect for recipients' trait perceived support, as well as for relationships that were stable over occasions and relationships that varied across occasions. No social support effects were found for negative affect. Perceived similarity was a consistent predictor of recipients' support perceptions. Implications for social support models and interventions were discussed. 相似文献
160.
Repeated administration of cognitive tests improves test performance, making it difficult for researchers to gauge the true extent of age-related cognitive decline. The authors examined this issue using data from the Rush Religious Orders Study and linear mixed-effects models. At annual intervals for up to 8 years, more than 800 older Catholic clergy members completed the same set of 19 cognitive tests from which previously established composite measures of cognitive domains were derived. Retest effects on some measures were substantial and continued to accumulate even after 8 annual test readministrations, but effects on other measures were minimal. Across cognitive measures, retest effects were not related to age, sex, or education. Individual differences in retest effects were substantial but not consistent across cognitive measures. The results suggest that retest-based improvement in cognitive test performance can be substantial and persistent. 相似文献