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   2163篇
  免费   84篇
  2020年   29篇
  2019年   34篇
  2018年   52篇
  2017年   46篇
  2016年   55篇
  2015年   33篇
  2014年   38篇
  2013年   239篇
  2012年   60篇
  2011年   79篇
  2010年   54篇
  2009年   35篇
  2008年   73篇
  2007年   79篇
  2006年   72篇
  2005年   78篇
  2004年   74篇
  2003年   61篇
  2002年   58篇
  2001年   39篇
  2000年   33篇
  1999年   38篇
  1998年   35篇
  1997年   20篇
  1996年   30篇
  1995年   24篇
  1994年   22篇
  1993年   23篇
  1992年   19篇
  1991年   20篇
  1990年   22篇
  1989年   21篇
  1988年   28篇
  1987年   19篇
  1986年   24篇
  1985年   31篇
  1984年   33篇
  1983年   20篇
  1982年   33篇
  1981年   30篇
  1980年   29篇
  1979年   32篇
  1978年   24篇
  1977年   26篇
  1976年   29篇
  1975年   26篇
  1974年   33篇
  1973年   29篇
  1971年   20篇
  1970年   21篇
排序方式: 共有2247条查询结果,搜索用时 46 毫秒
111.
112.
Social networks provide a larger context than that of the nuclear family in which the child develops. In order to examine the networks of young children, mothers of 75 handicapped children, aged 3 to 6 years, and a matched sample of normal children were surveyed in terms of people in the child's network and frequency of daily contact. The effects of age of subject and handicapping condition on social network composition and contact were of interest. Handicapping condition played a much greater role in the network composition than did chronological age. Handicapped children had larger networks, although they did not have daily contact with network members compared to normal children. Handicapped children thus were not isolated, but appeared to have a large network composed of relatives and adults and, to a lesser extent, peers. Normal children showed a developmental shift, in terms of an increase in the proportion of peers to adults, from 3 to 6 years, whereas handicapped children did not show this change. It is suggested that the handicapped child's developmental delay and caregiving demands may necessitate greater and more prolonged adult contact, which, consequently, constrains the nature of the social network in terms of adult and peer composition. Insufficient peer contact may restrict the handicapped child's opportunity to learn important social skills.  相似文献   
113.
114.
115.
This longitudinal study examined adolescent girls' perception of control over sexually transmitted disease (STD) acquisition. Participants were asked questions regarding their perception of their STD locus of control (internal control; control by parents, partners, peers, and health care providers; and chance) at two waves of data collection. Of the 116 participants (mean age = 17 years), 82% were African-American and 18% were Caucasian. Responses to the measure of locus of control were significantly correlated across a 6-month interval. The responses regarding internal control, control by partner, and chance were not related to the acquisition of an STD in the next 6 months. Further, they were not influenced by an STD in the preceding 6 months. These results indicate that responses to a locus of control measure were stable over a 6-month period, and internal, partner, and chance locus of control perceptions seem to be neither determined by STD experience nor directly related to future STD acquisition. However, understanding an individual's locus of control may be helpful in providing appropriate counseling. Future research could examine how adolescent girls form their perceptions of control over STD acquisition.  相似文献   
116.
Support groups are rapidly becoming an important part of the recovery process for many people who stutter, and a growing number of speech-language pathologists (SLPs) are encouraging their clients to participate in support groups. At present, however, little is known about the individuals who join stuttering support groups and the benefits they derive from their participation. This study surveyed members of the National Stuttering Association (NSA) to learn about their experiences in support groups, as well as their experiences in speech therapy. Respondents were 71 people who attended the 1999 NSA conference in Tacoma, WA. The majority of respondents had participated in treatment several times during their lives, using a variety of techniques. Respondents who had participated in fluency-shaping treatments were more likely to report that they had experienced a relapse than those who had participated in stuttering modification or combined treatments. Also, there was a strong positive correlation between respondents' satisfaction with treatment and their judgments of clinicians' competence, suggesting that improved training for SLPs should lead to improved treatment for people who stutter. Results will be used to provide a foundation for further evaluations of the benefits of support group participation for people who stutter. EDUCATIONAL OBJECTIVES: The reader will learn (a) that many people who participate in the NSA have had numerous and varied experiences with speech treatment throughout their lives, (b) which aspects of treatment and support group participation are seen as most beneficial for people who participate in the NSA.  相似文献   
117.
The objective of this research was to test substance-related and non-substance-related psychiatric disorders as predictors of attempted suicide among adolescents. Ninety-six psychiatrically disordered suicide attempters were matched one-to-one to 96 psychiatrically disordered non-attempters on age, race, gender, and the presence/absence of major depression. Conditional logistic regression was used to test psychiatric risk factors for their power to predict attempted suicide among adolescents. Bipolar disorder, cocaine use disorders, and conduct disorder were found to be predictive of attempted suicide in univariate testing. Bipolar disorder, inhalant use disorders, cocaine use disorders, and hallucinogen use disorders were found to be predictive of attempted suicide, after adjusting for all other covariates. Loglinear analyses revealed high odds ratios associated with the comorbidities of alcohol use disorder with conduct disorder and drug use disorders with conduct disorder in both groups. Higher rates of cocaine use disorder/conduct disorder, hallucinogen use disorder/conduct disorder, and alcohol use disorder/ conduct disorder were found among suicide attempters. Evaluation of these particular comorbid conditions should be part of the adolescent suicide risk assessment.  相似文献   
118.
119.
The objective of this document is to provide health care professionals with recommendations for genetic counseling and testing of individuals with a suspected or confirmed diagnosis of Fabry disease, with a family history of Fabry disease, and those identified as female carriers of Fabry disease. These recommendations are the opinions of a multicenter working group of genetic counselors, medical geneticists, and other health professionals with expertise in Fabry disease counseling, as well as an individual with Fabry disease who is a founder of a Fabry disease patient advocacy group in the United States. The recommendations are U.S. Preventive Task Force Class III, and they are based on clinical experience, a review of pertinent English-language articles, and reports of expert committees. This document reviews the genetics of Fabry disease, the indications for genetic testing and interpretation of results, psychosocial considerations, and references for professional and patient resources. These recommendations should not be construed as dictating an exclusive course of management, nor does use of such recommendations guarantee a particular outcome. The professional judgment of a healthcare provider, familiar with the facts and circumstances of a specific case, will always supersede these recommendations.  相似文献   
120.
The modality by which object azimuths (directions) are presented affects learning of multiple locations. In Experiment 1, participants learned sets of three and five object azimuths specified by a visual virtual environment, spatial audition (3D sound), or auditory spatial language. Five azimuths were learned faster when specified by spatial modalities (vision, audition) than by language. Experiment 2 equated the modalities for proprioceptive cues and eliminated spatial cues unique to vision (optic flow) and audition (differential binaural signals). There remained a learning disadvantage for spatial language. We attribute this result to the cost of indirect processing from words to spatial representations.  相似文献   
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