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   35881篇
  免费   1660篇
  国内免费   18篇
  2020年   367篇
  2019年   488篇
  2018年   739篇
  2017年   795篇
  2016年   795篇
  2015年   573篇
  2014年   590篇
  2013年   2912篇
  2012年   1052篇
  2011年   1196篇
  2010年   758篇
  2009年   804篇
  2008年   1038篇
  2007年   991篇
  2006年   901篇
  2005年   768篇
  2004年   700篇
  2003年   762篇
  2002年   708篇
  2001年   1266篇
  2000年   1260篇
  1999年   898篇
  1998年   425篇
  1997年   343篇
  1995年   334篇
  1994年   340篇
  1992年   758篇
  1991年   738篇
  1990年   689篇
  1989年   646篇
  1988年   611篇
  1987年   618篇
  1986年   571篇
  1985年   651篇
  1984年   497篇
  1983年   395篇
  1982年   333篇
  1981年   340篇
  1979年   497篇
  1978年   377篇
  1977年   351篇
  1975年   451篇
  1974年   461篇
  1973年   505篇
  1972年   409篇
  1971年   341篇
  1969年   342篇
  1968年   398篇
  1967年   350篇
  1966年   404篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
221.
Pastors' children have been thought to have more behavioral problems than other children since they face high expectations and are part of families that are often under public scrutiny. The purpose of this study was to describe the social competencies and behavioral problems of a national sample of pastors' children, aged 4–16, and to compare them to age and sex standardized norms. Data were obtained on 98 children from a random sample of 62 families, using the Child Behavior Checklist. Results indicate that scores for both boys and girls at each age grouping fell within the acceptable norms for both social competencies and behavioral problems.  相似文献   
222.
The present study used a prospective design to investigate whether eight categories of daily negative life events or "hassles" differentially predict psychopathology levels, and/or changes in psychopathology levels over 1 month in a mixed-sex, nonclinical sample of undergraduate subjects. Hassles were assessed using the Revised Hassles Scale (HS-R; DeLongis, 1985); psychopathology was assessed using the Hopkins Symptom Checklist (SCL-90; Derogatis, Lipman, & Covi, 1973) on two occasions, separated by 1 month. Scores on all eight HS-R subscales predicted Time 2 scores on most or all of the SCL-90 psychopathology scales. However, the magnitudes of these correlations varied widely, indicating that these subscales may be substantially different in their abilities to predict psychopathology levels.  相似文献   
223.
This article describes further evidence for a new neural network theory of biological motion perception. The theory clarifies why parallel streams V1----V2, V1----MT, and V1----V2----MT exist for static form and motion form processing among the areas V1, V2, and MT of visual cortex. The theory suggests that the static form system (Static BCS) generates emergent boundary segmentations whose outputs are insensitive to direction-of-contrast and to direction-of-motion, whereas the motion form system (Motion BCS) generates emergent boundary segmentations whose outputs are insensitive to direction-of-contrast but sensitive to direction-of-motion. The theory is used to explain classical and recent data about short-range and long-range apparent motion percepts that have not yet been explained by alternative models. These data include beta motion, split motion, gamma motion and reverse-contrast gamma motion, delta motion, and visual inertia. Also included are the transition from group motion to element motion in response to a Ternus display as the interstimulus interval (ISI) decreases; group motion in response to a reverse-contrast Ternus display even at short ISIs; speed-up of motion velocity as interflash distance increases or flash duration decreases; dependence of the transition from element motion to group motion on stimulus duration and size, various classical dependencies between flash duration, spatial separation, ISI, and motion threshold known as Korte's laws; dependence of motion strength on stimulus orientation and spatial frequency; short-range and long-range form-color interactions; and binocular interactions of flashes to different eyes.  相似文献   
224.
This study was done to assess gender and cultural differences on neuroticism as a dimension of personality among both Canadians and Black South Africans. No statistically significant cross-cultural differences were observed. However, statistically significant gender differences emerged among both Canadian and African men and women, with the latter scoring higher on neuroticism than the former.  相似文献   
225.
This study compared two different interpretation styles (tentative and absolute), two levels of subjects' reactance (high and low), and gender on the counselor's social influence, willingness to see the counselor, willingness to help, ability to help, and subjects' anger. No significant main effects or interaction were found for the counselor's social influence, but men in contrast to women perceived the counselor as more willing to help and indicated that they were more willing to see the portrayed counselor. Highly reactant subjects were more willing to see the counselor when absolute interpretations were used; they also thought the counselor was more willing to help when absolute interpretations were used, whereas low reactant subjects thought the counselor was more willing to help when tentative interpretations were used. Mixed results were found for subjects' anger.  相似文献   
226.
Two cases of Gilles de la Tourette syndrome from India are presented. The symptomatology of Tourette syndrome is the same as that documented in western populations which suggests biological factors in the aetiology of the syndrome.  相似文献   
227.
Understanding the analyst's work and its vicissitudes has been a major focus of recent psychoanalytic writing. This study on slips of the analyst represents an attempt to advance our understanding of analytic work. The slips described support the view that slips reflect not simply contributions from instinctual life, but active work-related goals of the analyst in carrying out the analytic tasks. Countertransference is discussed as reflected in the disturbance of intentionality betrayed by the occurrence of a slip. The essential role of the analyst's understanding his or her own reactions is emphasized.  相似文献   
228.
229.
This study was designed to investigate the comparability of the original MMPI (1950) and the MMPI-2 (1989) with a psychiatric patient population. 34 male and 3 female patients, shortly after admission to one of two acute psychiatry units, completed the old and revised versions of the MMPI. Paired t tests indicated but scant differences for raw scores, while many more differences were found among T scores for validity, clinical, and supplemental scales. Analyses, however, showed all scales on the two forms to be highly correlated. Analysis of the high-point and two-point codes across the two administrations also showed relative stability, although the proportion of Scales 2 (Depression) and 8 (Schizophrenia) decreased, while those for Scales 6 (Paranoia) and 7 (Psychasthenia) increased markedly in the MMPI-2 protocols. Examination of each version's discriminability among mood- and thought-disordered subsamples suggested that the MMPI provides slightly better delineation between diagnostic classes. Discriminant function analyses showed that there were essentially no differences between the two forms in the accurate classification of clinical and nonclinical groups. The findings reported here provide support for the MMPI-2; despite modification, the newer form retains the advantages of the original MMPI. Differences found here may be unique to psychiatric patients and their patterns of MMPI/MMPI-2 equivalence and may not generalize to other special populations.  相似文献   
230.
Recent evidence suggests that there is a relationship between depression and immunity. On the basis of these studies, it has been argued that depressed mood may increase susceptibility to disease by means of aberrations occurring within the immune system. Empirical research investigating the relationship between depression and immunity is reviewed here. Studies examining both clinical and nonclinical manifestations of depression are discussed and evaluated. This review reveals that indexes of immunocompetence are lower among people exhibiting depressive symptomology and suggests that immune alterations may be more related to dysphoric mood than to specific situations or events. Alternative hypotheses accounting for links between depressed affect and altered immune states are provided, and suggestions for future research are offered.  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