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   50250篇
  免费   1829篇
  国内免费   13篇
  2019年   562篇
  2018年   773篇
  2017年   694篇
  2016年   806篇
  2015年   571篇
  2014年   734篇
  2013年   4529篇
  2012年   1247篇
  2011年   1335篇
  2010年   836篇
  2009年   840篇
  2008年   1218篇
  2007年   1163篇
  2006年   1096篇
  2005年   916篇
  2004年   925篇
  2003年   918篇
  2002年   878篇
  2001年   1537篇
  2000年   1540篇
  1999年   1144篇
  1998年   563篇
  1996年   631篇
  1995年   600篇
  1994年   581篇
  1993年   545篇
  1992年   1133篇
  1991年   1034篇
  1990年   1034篇
  1989年   922篇
  1988年   931篇
  1987年   884篇
  1986年   896篇
  1985年   891篇
  1984年   761篇
  1983年   674篇
  1982年   530篇
  1981年   536篇
  1979年   780篇
  1978年   618篇
  1975年   715篇
  1974年   738篇
  1973年   808篇
  1972年   747篇
  1971年   675篇
  1970年   583篇
  1969年   584篇
  1968年   751篇
  1967年   649篇
  1966年   619篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
911.
The use of computer based diagnostic decision and artificial intelligence are discussed in relation to the problems of validity and reliability of psychiatric diagnoses. The authors suggest a definition of a computer aided classificator as an existent decision system for an automatically analysis of findings.  相似文献   
912.
This article attempts to apply a theory of aggression as motivation to overcome obstacles to the understanding of phobic states and their formation. The role of aggression in the genesis of phobic conditions is discussed, and the traditional analytic view of aggression as instinctual drive is contrasted with a motivational approach. The motivational view offers the advantage of a clearer understanding of the stimulus contexts, representational connections, and both real and imaginary object connections that are lacking in the more traditional understanding of aggression as a biological drive.  相似文献   
913.
914.
Four of our own cases that presented a clinical picture of dementia are discussed. A study of the relative literature has failed to reveal any "swing" in the pattern of the clinical condition: Just as it did ninety years age, paralytic dementia accounts today for well over 60% of all cases, those clinical pictures erroneously regarded as "typical" "classic", accounting for a mere 10%-15% of cases. The need for routine lues serology is pointed out.  相似文献   
915.
A short-form measure of loneliness   总被引:5,自引:0,他引:5  
The revised UCLA Loneliness Scale (ULS-20) and a four-item short form (ULS-4) are widely used in personality research (Russell, Peplau, & Cutrona, 1980). In an exploratory factor analysis of the ULS-20, we identified eight items that loaded substantially on the first factor. These items were combined to form an alternative short-form measure, the ULS-8. The results of this study indicate that the ULS-8 is reliable, valid, and a better substitute for the ULS-20 than is the ULS-4. Consistent with the previous research, the loneliness measures (ULS-20, ULS-8, ULS-4) were strongly related to socially undesirable personality characteristics, but loneliness was uncorrelated with the six different health-related behaviors (exercise, meal regularity, alcohol use, hard drug use, smoking, and hours of sleep) assessed in this study.  相似文献   
916.
Adherents to the traditional model of alcoholism explain alcoholic behavior as a consequence of alcoholism. Alcoholism is identified as an unseen, unmeasured entity inherent in alcoholics. This concept parallels the thinking of Copernicus, Kepler, Galileo, and Newton, who believed in an unseen, unmeasurable creator behind the physical world. These traditional approaches contrast with the emergent model of alcoholism and twentieth-century scientific thought. Emergent scientific model adherents explain alcoholic behavior without resort to unseen factors. Since the traditional and emergent scientific models begin with different assumptions, model adherents experience communication difficulties. Future developments with determine which model will dominate the field of alcohol studies and treatment.  相似文献   
917.
School psychologists serving a national, systematic sample of public elementary and secondary schools were surveyed regarding recent referrals. Most referrals were initiated by school staff members (75% of referrals), and the majority occured initially through formal mechanisms (55% of referrals). Most informal requests for assistance or information eventually became, or were thought likely to become, formal referrals. In 92% of cases, the referral agent's initial communication with the psychologist included some designation of what the pupil was doing or not doing that was viewed as problematic. Poor academic performance was of primary concern in 52% of referrals and social/emotional problems in 31%. More boys were referred than girls, and one-half of referrals from the elementary grades involved pupils in grades K-2. Frequency of referral and reason for referral were not independent of pupil's grade or sex. Reason for referral was independent of time of year (October vs. May) and geographical region.  相似文献   
918.
Six pigeons were trained in a discrete-trials signal-detection procedure to discriminate between a fixed-duration stimulus (5 s or 20 s) and a set of variable durations ranging from 2.5 s to 57.5 s in steps of 5 s. For each fixed-duration stimulus, the ratio of reinforcer frequencies contingent upon reporting the fixed versus the variable stimulus was systematically manipulated. Detection performance was well controlled by both the stimulus value and the reinforcer ratio. Both the discriminability between the fixed duration and the set of variable durations, and the discriminability between the fixed duration and each of the variable durations, were independent of the reinforcer-frequency ratio when discriminability was measured as log d. The sensitivity of response bias to reinforcement-ratio changes was independent of the value of the fixed duration, but was not independent of the discriminability of the variable durations from the fixed durations. Under current models, discriminability measures in complex temporal discrimination may be independent of biasing manipulations, but bias measures are not independent of stimulus values.  相似文献   
919.
The focus of this study is on the religious service at which many skid-row rescue missions require attendance to receive benefits. Data were obtained from an observation study of thirty-seven skid-row rescue missions in Los Angeles and Seattle, interviews with ten mission directors, and mission newsletters. The missions use material benefits to attract potential converts. The theme of spiritual conversion is predominant in the mission service (sermons, songs, testimonies). Mission personnel feel they have been called by God, often have backgrounds similar to the people they serve, and view the skid rowers' problems as primarily personal and spiritual. Skid rowers resent the use of religion as bait, view their problems as primarily structural, and use the missions only as a last resort. The missions need to be compared to other alcoholism rehabilitation and religious institutions. A key component to their continued existence is outside Christian supporters.  相似文献   
920.
Religious and spiritual issues in mental health are explored in the context of four conceptual models: the medical, the nursing, the humanistic, and the pastoral. This is done by looking at each model in terms of content, diagnostic focus, language and treatment goals, and primary qualities in the health provider.The models are illustrated by case studies gathered from a multidisciplinary setting. The discovery that each model can incorporate the religious and spiritual dimension in mental health care, but that each model does this in distinctive ways, is a key point.  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