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   55940篇
  免费   2267篇
  国内免费   27篇
  58234篇
  2020年   642篇
  2019年   737篇
  2018年   1077篇
  2017年   1093篇
  2016年   1122篇
  2015年   772篇
  2014年   995篇
  2013年   4264篇
  2012年   1774篇
  2011年   1819篇
  2010年   1113篇
  2009年   1151篇
  2008年   1622篇
  2007年   1647篇
  2006年   1477篇
  2005年   1316篇
  2004年   1217篇
  2003年   1172篇
  2002年   1159篇
  2001年   1805篇
  2000年   1753篇
  1999年   1351篇
  1998年   583篇
  1997年   561篇
  1996年   513篇
  1995年   514篇
  1992年   1137篇
  1991年   999篇
  1990年   1103篇
  1989年   946篇
  1988年   958篇
  1987年   911篇
  1986年   933篇
  1985年   921篇
  1984年   798篇
  1983年   734篇
  1982年   539篇
  1979年   845篇
  1978年   622篇
  1977年   522篇
  1975年   705篇
  1974年   791篇
  1973年   835篇
  1972年   638篇
  1971年   598篇
  1970年   533篇
  1969年   593篇
  1968年   716篇
  1967年   643篇
  1966年   606篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
831.
Sixteen student volunteers were administered a placebo and 50 mg. of chlorpromazine in tablet form, on separate occasions, two hours before testing. The three tests measured dichotic listening performance, lateral eye movements while answering questions about spatial location and verbal meaning, and lateralized facial expression while relating pleasant and unpleasant life incidents. Results showed that chlorpromazine increased the number of trials showing an ear advantage in dichotic listening. Chlorpromazine reduced lateral and increased vertical eye movements in response to the questions about spatial location and verbal meaning. Under the placebo both negative and positive emotions were expressed more in the left face. Although chlorpromazine did not affect this lateralization of negative emotions, the expression of positive emotions occurred equally often on the two sides of the face under chlorpromazine. Results may be related to an effect of chlorpromazine on the asymmetrical dopamine pathways of the brain. It is suggested that the findings may be related to a left hemisphere deficit in schizophrenia.  相似文献   
832.
Normative data are presented for the probability of successfully completing 192 single-solution word fragments. Normative data on the familiarity of college students with the solution words are also given, along with estimates of word frequency from existing norms. Regression analyses were performed in order to predict fragment completion difficulty from familiarity, frequency, and several structural characteristics of the fragments. Familiarity, whether or not first and/or last letters appeared in the fragment, and the ratio of letters to missing letters in the fragment were included in the regression equation as significant predictors of difficulty for this fragment set.  相似文献   
833.
The Scheduled Measurement System (SMS) is a collection of related programs for administering performance and rating tasks to human subjects. It was designed to provide a common task scheduling and data management environment for a diversity of measures. SMS has greatly reduced the effort required to analyze and archive data after experiments, but it has been less successful in reducing some of the effort required to implement experiments. While programming is not difficult, documentation and user training remain the most primitive parts of the system.  相似文献   
834.
M L Clark 《Adolescence》1986,21(81):205-213
The differences in the personality and social backgrounds of science and non-science majors were assessed for 91 black and 109 white natural, social, and nonscience college majors. Subjects were administered the 16PF, Bem Sex-Role Inventory, and the Attitude Toward Women Scale, and data were collected on birth order, number of siblings, and social class level. Natural science majors were of a higher social class, had higher intelligence test scores, were more reserved, sober, practical, and male sex-role oriented than the social and non-science majors. Blacks and females resembled their white or male counterparts when categorized by college major.  相似文献   
835.
R L Calabrese  H Schumer 《Adolescence》1986,21(83):675-687
This research evaluated the effects of involvement of adolescents in community service activities on levels of alienation. It was proposed that alienation could be reduced through the implementation of a model which utilized community service activities to facilitate adolescent access to adult society, development of responsibility, collaborative and cooperative work, and control over planning and outcomes. It is suggested that adolescent involvement in service activities can produce positive benefits, among which are reduced levels of alienation, improved school behavior, improved grade point average, and acceptance by the adult community. These findings also suggest that females respond more positively to school when allowed to problem-solve collectively and collaboratively.  相似文献   
836.
Studies of the variables that determine whether an adolescent is placed in the mental health or juvenile justice system for treatment have led to conflicting conclusions based on impressionistic data. The primary hypothesis of this study--that demographic variables would and personality/psychopathology variables would not differentiate into which system a youth will be placed--was supported. Adolescents were studied at intake into both the juvenile justice system and the mental health system. Data were collected on demographics (structured interviews), personality/psychopathology (MMPI), social adjustment (CAAP), and academic achievement (PIAT). A discriminant function analysis identified eight statistically significant variables which differentiated the two groups. In order of decreasing importance they are: ethnicity, gender, MMPI-depression, previous mental health history, CAAP-productivity, drug use, parental marital history, and parental religious preference.  相似文献   
837.
Recognizing people seen in events via dynamic "mug shots"   总被引:1,自引:0,他引:1  
This study examined effects of an event and dynamic mug shots on facial recognition. Witnesses saw either a film of a liquor store holdup staged by six perpetrators, slides of the same targets, or freeze-framed views from the filmed event. Slides of different facial views of targets among 12 foils, or dynamic 180 degrees mug shots of the same men, or multiple static views were administered 24 hr later in yes-no recognition tests. Recognition (d') was poorer for the same men seen in the event than in slides, but better for dynamic than for static mug shots. Nondynamic event characteristics were responsible for poor recognition of people seen in events, whereas dynamic aspects of facial transformations, not multiple views, seemed responsible for the superiority of dynamic mug shots. The implications of these results for issues of ecological validity of traditional face recognition methodology and for static feature models vs. dynamic transformation models of face recognition are discussed.  相似文献   
838.
For nearly six decades after its publication in 1905, Freud's remarkable case of Dora remained untouched by critical comment. However, beginning in the early 1970's, an abundance of articles began to appear, which focused exclusively on the Dora case. The present paper reviews the literature of this so-called "Dora revival" in order to explain the historical and theoretical reasons leading to this extraordinary burst of research. Above all, two vital developments in the psychoanalytic discipline created the climate that fostered the Dora revival. First, there was a revolutionary change in attitude toward the phenomenon of countertransference: in contrast to the classical view of countertransference as a disruptive interference in treatment, analysts increasingly regarded countertransference as a pervasive and natural process, which could be potentially utilized to enhance understanding of the patient's unconscious conflicts and defenses. Second, there was enormous and rapid growth of a comprehensive psychoanalytic theory of adolescence and its treatment. Thus, based on a more favorable attitude toward countertransference, and a much improved understanding of the unique problems of adolescence, psychoanalysts could reexamine and better understand the decisive events that contributed to Freud's abortive analytic treatment of Dora.  相似文献   
839.
840.
Amnesia and crime. How much do we really know?   总被引:1,自引:0,他引:1  
  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