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   565篇
  免费   31篇
  2021年   4篇
  2020年   7篇
  2019年   11篇
  2018年   14篇
  2017年   18篇
  2016年   17篇
  2015年   17篇
  2014年   10篇
  2013年   70篇
  2012年   16篇
  2011年   18篇
  2010年   7篇
  2009年   11篇
  2008年   25篇
  2007年   26篇
  2006年   27篇
  2005年   18篇
  2004年   21篇
  2003年   11篇
  2002年   17篇
  2001年   14篇
  2000年   19篇
  1999年   12篇
  1998年   5篇
  1997年   6篇
  1996年   4篇
  1995年   6篇
  1994年   6篇
  1993年   6篇
  1992年   9篇
  1991年   7篇
  1989年   4篇
  1988年   5篇
  1987年   8篇
  1986年   5篇
  1985年   7篇
  1984年   8篇
  1983年   7篇
  1982年   6篇
  1978年   10篇
  1977年   5篇
  1976年   5篇
  1975年   4篇
  1974年   7篇
  1973年   7篇
  1971年   4篇
  1969年   7篇
  1968年   5篇
  1967年   4篇
  1966年   6篇
排序方式: 共有596条查询结果,搜索用时 15 毫秒
111.
Youthful smokers have been described as extroverted and peer-involved, whereas older smokers are often characterized as depressed and withdrawn. Recognizing this contradiction, we examined cross-sectional and prospective associations between smoking and personality and social constructs assessed every 4 years in a sample (N= 461) originally recruited in junior high school. At Time 1, smoking was positively related to good social relations, extroversion, friends' cigarette use, and cheerfulness. At Times 2–4, smoking was positively related to depression and friends' cigarette use, negatively correlated with good Social Relations, and unrelated to extroversion. Cigarette use was stable over time, but least stable between Times 1 and 2. Findings suggest the instability of early social smoking with peers; those who persist may smoke for tension reduction and self-medication.  相似文献   
112.
113.
114.
Male rats, 90-100 days old, with frontal cortex lesions were given either subcutaneous sterile water (SW) as a vehicle control or 1, 10, or 100 micrograms of BIM-22015 every other day for 20 days. Brain-injured subjects tested in the Morris water maze with either 10 micrograms BIM-22015 or SW took significantly more trials than sham-operated rats to locate a submerged platform eight consecutive times within 60 s. The animals given 1 or 100 micrograms BIM-22015 took significantly fewer trials to reach criterion than brain-injured animals in the other drug treatment groups. On a percentage of savings, measured 8 days after reaching criterion, the brain-injured subjects given 1, 10, or 100 micrograms BIM-22015 did not differ from sham-operated rats. In contrast, the brain-injured animals given SW took longer to find the submerged platform than they did during the initial training. To assess long-term effects of the ACTH analog treatment, rats were trained on a delayed spatial alternation task 30 days after receiving the last injection. On this task, brain-injured rats treated with the 10-micrograms dose performed significantly better than those given sterile water. Acetylcholinesterase (AChE)-labeled neurons counted in the nucleus basalis magnocellularis indicated that rats with frontal cortex damage given the 10-micrograms treatment did not differ from the sham controls and had significantly more AChE-positive neurons than injured counterparts treated with SW or 100 micrograms.  相似文献   
115.
116.
Family therapies which aim to begin treatment in the first session leave the practitioner at a disadvantage regarding the collection of demographic, historical, and genealogical data that may be useful as treatment proceeds. Not wanting to disrupt interactional reciprocity and flow, the therapist cannot perform methodical anamnesis. The Self-report Family Data Form is presented for collecting useful biographical data from families in treatment without interfering with the clinical interaction.  相似文献   
117.
118.
Brain damage and recovery: problems and perspectives   总被引:1,自引:0,他引:1  
  相似文献   
119.
Subject/observers were accurate in identifying emergent leadership hierarchies on four leadership dimensions when provided records of target groups' meetings containing only verbal communications, only nonverbal communications, or both types of behavior. With knowledge of participation rates controlled by covariance, the subject/observers' accuracy scores retained significance in three of the information conditions demonstrating the presence of verbal and nonverbal leadership cues independent of participation rates. The value of verbal and nonverbal communications to identifying leaders varied with the type of leadership hierarchy being identified. The findings are presumed to hold for leader selection as well. The author proposes that the question of why a group member has emerged to fulfill a leadership role in a group be studied from the point of view of group members' selecting leaders or permitting emergence rather than leaders emitting behaviors.  相似文献   
120.
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