首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   503篇
  免费   13篇
  2019年   10篇
  2018年   11篇
  2017年   10篇
  2016年   15篇
  2015年   7篇
  2014年   9篇
  2013年   60篇
  2012年   14篇
  2011年   18篇
  2010年   7篇
  2009年   11篇
  2008年   18篇
  2007年   15篇
  2006年   14篇
  2005年   11篇
  2004年   15篇
  2003年   15篇
  2002年   15篇
  2001年   5篇
  2000年   9篇
  1999年   8篇
  1998年   13篇
  1997年   9篇
  1996年   10篇
  1995年   6篇
  1994年   11篇
  1992年   7篇
  1991年   10篇
  1990年   7篇
  1989年   9篇
  1988年   4篇
  1987年   12篇
  1986年   4篇
  1985年   4篇
  1984年   4篇
  1983年   9篇
  1981年   6篇
  1980年   6篇
  1979年   5篇
  1977年   6篇
  1975年   8篇
  1973年   6篇
  1972年   6篇
  1971年   3篇
  1970年   3篇
  1969年   4篇
  1968年   6篇
  1966年   8篇
  1964年   4篇
  1954年   4篇
排序方式: 共有516条查询结果,搜索用时 15 毫秒
451.
452.
Counselors must demonstrate ethical standards of the profession and abide by the law. This task is made challenging by the fact that the mental health and legal systems represent 2 different, sometimes conflicting cultures. Using a cross‐cultural perspective, overlapping or common elements of each culture are noted, differing elements of each culture are identified, and recommendations are provided for the 2 cultures to work together as effectively as possible.  相似文献   
453.
The disease now called AIDS was first reported among injecting drug users in 1981. This article reviews the last 15 years of research on preventing HIV infection and AIDS among injecting drug users. Many of the findings were surprising in the context of previous understandings of the illicit injection of psychoactive drugs—both with respect to the much-larger-than-expected size of the epidemic and the much-greater-than-expected potential for behavior change among drug injectors (IDU). The research is reviewed within a framework of eight issues: the importance of the problem in the United States, the global diffusion of injecting drug use, the global diffusion of HIV among IDUs, potential rapid spread of HIV among IDUs, risk reduction among IDUs, community-level prevention, syringe exchange programs, and developing a public-health perspective on psychoactive drug use.  相似文献   
454.
455.
What brain mechanisms underlie autism, and how do they give rise to autistic behavioral symptoms? This article describes a neural model, called the Imbalanced Spectrally Timed Adaptive Resonance Theory (iSTART) model, that proposes how cognitive, emotional, timing, and motor processes that involve brain regions such as the prefrontal and temporal cortex, amygdala, hippocampus, and cerebellum may interact to create and perpetuate autistic symptoms. These model processes were originally developed to explain data concerning how the brain controls normal behaviors. The iSTART model shows how autistic behavioral symptoms may arise from prescribed breakdowns in these brain processes, notably a combination of underaroused emotional depression in the amygdala and related affective brain regions, learning of hyperspecific recognition categories in the temporal and prefrontal cortices, and breakdowns of adaptively timed attentional and motor circuits in the hippocampal system and cerebellum. The model clarifies how malfunctions in a subset of these mechanisms can, through a systemwide vicious circle of environmentally mediated feedback, cause and maintain problems with them all.  相似文献   
456.
The anterior cingulate cortex (ACC) is believed to be involved in the executive control of actions, such as in monitoring conflicting response demands, detecting errors, and evaluating the emotional significance of events. In this study, participants performed a task in which evaluative feedback was delayed, so that it was irrelevant to immediate response control but retained its emotional value as a performance indicator. We found that a medial frontal feedback-related negativity similar to the error-related negativity (ERN) tracked affective response to the feedback and predicted subsequent performance. Source analysis of the feedback-related negativity and ERN revealed a common dorsomedial ACC source and a rostromedial ACC source specific to the ERN. The oscillatory nature of these sources provides further evidence that the ERN reflects ongoing theta activity generated in the mediofrontal regions. These results suggest that action regulation by the cingulate gyrus may require the entrainment of multiple structures of the Papez corticolimbic circuit.  相似文献   
457.
This study addresses 5 unresolved issues in the neuropsychology of antisocial behavior using a community sample of 325 school boys in whom neurocognitive measures were assessed at age 16-17 years. Antisocial behavior measures collected from age 7-17 years were cluster analyzed and produced 4 groups: control, childhood-limited, adolescent-limited, and life-course persistent. Those on the lifecourse persistent path and also on the childhood-limited path were particularly impaired on spatial and memory functions. Impairments were independent of abuse, psychosocial adversity, head injury, and hyperactivity. Findings provide some support for the life-course persistent versus adolescent-limited theory of antisocial behavior and suggest that (a) neurocognitive impairments are profound and not artifactual and (b) childhood-limited antisocials may not be free of long-lasting functional impairment.  相似文献   
458.
Wells D  Miller M  Tobacyk J  Clanton R 《Adolescence》2002,37(146):431-434
The effectiveness of an ecologically oriented approach in changing the self-concepts of 80 high-risk adolescents was investigated. Participants were administered a self-esteem scale before and after an eight-week psychoeducational program designed for dropout prevention. Results indicated significant reductions in dropout rates and increased self-esteem among participants.  相似文献   
459.
This study investigated whether cognitions and behavior in an asymmetric social dilemma can be predicted by national culture. Results indicated that, as predicted, groups of decision makers from Japan--a collectivist, hierarchical culture-were more cooperative, expected others to be more cooperative, and were more likely to adopt an equal allocation distribution rule to resolve the dilemma than were groups of decision makers from the United States-an individualist, egalitarian culture. An opportunity for communication had a greater impact on expectations of others' behavior in groups of U.S. decision makers than in groups of Japanese decision makers.  相似文献   
460.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号