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   51796篇
  免费   2142篇
  国内免费   19篇
  2020年   532篇
  2019年   641篇
  2018年   915篇
  2017年   905篇
  2016年   927篇
  2015年   634篇
  2014年   845篇
  2013年   3801篇
  2012年   1514篇
  2011年   1638篇
  2010年   935篇
  2009年   1003篇
  2008年   1428篇
  2007年   1412篇
  2006年   1323篇
  2005年   1162篇
  2004年   1143篇
  2003年   1067篇
  2002年   1069篇
  2001年   1678篇
  2000年   1590篇
  1999年   1224篇
  1998年   599篇
  1997年   507篇
  1992年   976篇
  1991年   908篇
  1990年   943篇
  1989年   895篇
  1988年   869篇
  1987年   810篇
  1986年   851篇
  1985年   945篇
  1984年   749篇
  1983年   684篇
  1982年   550篇
  1981年   511篇
  1979年   801篇
  1978年   601篇
  1977年   493篇
  1976年   528篇
  1975年   698篇
  1974年   794篇
  1973年   817篇
  1972年   644篇
  1971年   590篇
  1970年   560篇
  1969年   601篇
  1968年   741篇
  1967年   643篇
  1966年   657篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
951.
The present study evaluated psychometric features and correlates of the Interview for Antisocial Behavior (IAB), a new measure designed to assess antisocial child behavior. Parents of 264 psychiatric inpatients (ages 6–13 years) completed the measure to evaluate antisocial behavior of their children. The investigation evaluated the relation of IAB scores to clinically derived diagnoses and to aggression and externalizing behaviors, as measured by different raters (parents, teachers), across different settings (home, school, hospital), and with different assessment methods (rating scales, behavioral role-play test). The results indicated that the IAB showed acceptable levels of internal consistency. A priori scores (severity, duration, total antisocial behavior) and factor analytically derived scales (Arguing/Fighting, Covert Antisocial Behaviors, Self-Injury) distinguished children with a DSM III diagnosis of conduct disorder, and scores on the IAB were more consistently related to other measures of aggression and externalizing behavior than to measures of internalizing behavior or overall severity of dysfunction. The implications of the results for use of the measure, particularly in relation to evaluation of the overt-covert dimension of antisocial behavior, are discussed.Completion of this research was facilitated by a Research Scientist Development Award (MH00353) and by grants (MH35408, MH39642) from the National Institute of Mental Health and the Rivendell Foundation.  相似文献   
952.
The acquisition of discrimination of five pairs of pattern cues in a Wisconsin General Testing Apparatus by 223 naive macaque monkeys was compared. The pairs of discriminanda were identical in configuration but varied slightly in either the size of the cue or the size of the background plaque; thus, the degree of separation of the cue from the fringe of the plaque, the response site, was slightly different for each pair of discriminanda. These small differences in cue-response separation had marked effects on the rate of acquisition of the discriminations. Even an increment of separation as small as 0.5 cm resulted in a remarkable retardation of the acquisition. This retardation was due entirely to prolonged performance at the chance level, and not to a slow rate of improvement from the chance to a criterion level. The finding indicates that the difficulty in the acquisition learning on pattern tasks depends largely on the difficulty of attending to the pattern cues at small cue-response separations.  相似文献   
953.
954.
Since the 1970s, investigative profilers at the FBI's Behavioral Science Unit (now part of the National Center for the Analysis of Violent Crime) have been assisting local, state, and federal agencies in narrowing investigations by providing criminal personality profiles. An attempt is now being made to describe this criminal-profile-generating process. A series of five overlapping stages lead to the sixth stage, or the goal of apprehension of the offender: (1) profiling inputs, (2) decision-process models, (3) crime assessment, (4) the criminal profile, (5) investigation, and (6) apprehension. Two key feedback filters in the process are: (a) achieving congruence with the evidence, with decision models, and with investigation recommendations, and (b) the addition of new evidence.  相似文献   
955.
MATHEMATICS AND SELF-ESTEEM: IMPLICATIONS FOR WOMEN'S CAREER CHOICE   总被引:1,自引:0,他引:1  
The relationship of math participation and success to self-esteem and career goals is examined in a sample of 64 women and 52 men college students at the end of their sophomore year. No gender differences were found in math anxiety or perceptions of the usefulness of mathematics, but women were less likely to select a math-related career goal. Among the men students, math participation and self-assessments of math ability were positively related to more general self-estimates of competence; among women, these variables were not related significantly. Women's choices for math-related careers were more closely associated with scholastic ability and math background than were men's career choices. These results are discussed in the context of societal pressures and supports for men and women in regard to math participation.  相似文献   
956.
Human relations training includes counselling as an important ingredient. This case-study reports the learning of one primary deputy headteacher during a six-day course, and her continuing efforts to use and extend that learning during the following year. She reported an improvement in classroom discipline, and less stressful and more effective relationships with colleagues and pupils, linking these gains with insights and skills developed on the course. The value to course designers of goal-setting structures is illustrated by the study. Such structures provide an opportunity to take part in, and study, counselling interventions which have real problems as their focus.  相似文献   
957.
The factors perceived as helpful by members of three different types of self-help groups are examined, using the 12 factors identified by Yalom as operative in group psychotherapy. Questionnaires were given to 45 members of self-help groups, asking for their views of the most and least helpful aspects of their experiences of their group, and for their judgement of its effectiveness. Results indicated that members of a group concerned with social and personal support in the face of a socially problematic situation (widowhood) found the experience of Universality to be the most helpful factor, while Self-Disclosure was least helpful. Members from a group for the physically sick (asthma sufferers) also reported the least helpful factor to be Self-Disclosure, but said that the most helpful factor was Guidance. By contrast, the group concerned with providing 'therapy' for depressives reported Cohesiveness to be most helpful, and Guidance to be least helpful. Comparison with other studies using similar methodologies with different group populations suggests that the factors likely to be effective in self-help groups for the socially unsupported and physically sick on the one hand, and for the psychologically disturbed on the other, may differ.  相似文献   
958.
E K Warrington  M James 《Perception》1986,15(3):355-366
An investigation is reported of the ability of normal subjects and patients with right-hemisphere lesions to identify 3-D shadow images of common objects from different viewpoints. Object recognition thresholds were measured in terms of angle of rotation (through the horizontal or vertical axis) required for correct identification. Effects of axial rotation were very variable and no evidence was found of a typical recognition threshold function relating angle of view to object identification. Although the right-hemisphere-lesion group was consistently and significantly worse than the control group, no qualitative differences between the groups were observed. The findings are discussed in relation to Marr's theory that the geometry of a 3-D shape is derived from axial information, and it is argued that the data reported are more consistent with a distinctive-features model of object recognition.  相似文献   
959.
Safir  Marilyn P. 《Sex roles》1986,14(11-12):581-590
Sex Roles - This paper contrasts the results of studies examining sex differences in intellectual functioning in the United States and in Israel. Israeli studies indicate earlier sex differences as...  相似文献   
960.
Summary Human observers can selectively allocate processing resources to different areas of the visual field within a single fixation. This spatial attention system may affect either the quality of information extraction or the decisions and responses based on this information. This paper reviews evidence from behavioral, single-unit, and event-related potential paradigms; the evidence suggests a relatively early locus of spatial attention.This research was supported by the U. S. Army Research Office under contract DAAG 29-83-K-0049. Portions of this paper were presented to the Conference on Attention and Action, Bielefeld, West Germany, in July 1985  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