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   171154篇
  免费   7661篇
  国内免费   157篇
  2020年   2782篇
  2019年   3442篇
  2018年   3450篇
  2017年   3897篇
  2016年   4581篇
  2015年   3930篇
  2014年   4798篇
  2013年   23451篇
  2012年   4410篇
  2011年   3439篇
  2010年   3798篇
  2009年   4738篇
  2008年   3697篇
  2007年   3205篇
  2006年   3859篇
  2005年   3875篇
  2004年   3393篇
  2003年   3040篇
  2002年   2831篇
  2001年   3075篇
  2000年   2909篇
  1999年   2968篇
  1998年   2802篇
  1997年   2646篇
  1996年   2570篇
  1995年   2396篇
  1994年   2365篇
  1993年   2317篇
  1992年   2507篇
  1991年   2362篇
  1990年   2205篇
  1989年   2154篇
  1988年   2097篇
  1987年   2161篇
  1986年   2151篇
  1985年   2386篇
  1984年   2491篇
  1983年   2263篇
  1982年   2356篇
  1981年   2333篇
  1980年   2161篇
  1979年   2182篇
  1978年   2148篇
  1977年   2144篇
  1976年   1918篇
  1975年   2012篇
  1974年   2053篇
  1973年   1956篇
  1972年   1550篇
  1971年   1515篇
排序方式: 共有10000条查询结果,搜索用时 125 毫秒
941.
This study investigated the performance of 38 learning disabled and 16 emotionally impaired children and youth on the Wechsler Intelligence Scale for Children--Revised, Wide Range Achievement Test--Revised, and Minnesota Percepto-Diagnostic Test--Revised. The ages of the children ranged from 8.4 to 16.7 years (M = 12.4, SD = 3.6). The findings suggest that discriminate functional analysis may be useful in the differential diagnosis process. Implications for clinicians are discussed.  相似文献   
942.
943.
H Gekle 《Psyche》1992,46(10):897-922
Freud's profound scepticism about philosophy and its fondness for philosophical "systems" is well-known. From an early stage, the author of the "Interpretation of Dreams" was convinced that philosophy--like animism--was nothing other than a narcissistic attempt to explain the world systematically from one single point. That point is the ego, synthesising everything manifold, alien and threatening into an intelligible mould and subjecting it to the intellectual censorship of the cogito. Gekle shows that Freud's "Interpretation of Dreams" undercuts and decentralizes the imperialist claims of the ego, thus opening up vistas on the areas where the ego is not sole and undisputed master. At the same time, however, it becomes apparent that the decentralizing work of dream interpretation is itself confronted by a paradox. The insights gained in the process cannot be presented in any other than a theoretical, systematic and hence ego-oriented form.  相似文献   
944.
In this paper we study the acquisition of German noun plurals in relation to the question of how children represent regular and irregular inflection. Pinker and Prince (1992) have demonstrated several dissociations between regular and irregular inflection in the English past tense system. However, in English, the default status of -ed is confounded with its high frequency; therefore inflectional systems other than English past tense formation must be examined. The noun plural system in German is particularly interesting, because most nouns have irregular plurals in German and the regular (default) plural is less frequent than several of the irregular plurals. Thus it is unclear how a language learner determines whether German even has a regular plural, and if so what form it takes. Based on longitudinal data from impaired and unimpaired monolingual German-speaking children, we find a striking, statistically significant correlation: plural affixes that are used in overregularizations, namely -n or -s, are left out within compounds. This correlation shows that even impaired children are sensitive to the distinction between regular and irregular morphology. We propose a linguistic analysis of the correlation in terms of Kiparsky's (1982, 1985) level-ordering model plus an additional ordering condition on affixes: default (regular) affixes cannot serve as input to compounding processes.  相似文献   
945.
Psychological research is increasingly involved in debates regarding abortion. While recognizing the diversity of ethical and moral issues intertwined with abortion, the American Psychological Association (APA) has focused its involvement on psychological factors, most recently by appointing an expert panel to review the literature on psychological effects. This article notes the history of APA involvement and reports on the panel's conclusions. It presents evidence that abortion is not likely to be followed by severe psychological responses and that psychological aspects can best be understood within a framework of normal stress and coping rather than a model of psychopathology. Correlates of more negative responses following abortion are also discussed.  相似文献   
946.
947.
Reaction time to threat stimuli in panic disorder and social phobia   总被引:2,自引:0,他引:2  
Two studies assessed response time among clinically anxious subjects and normal controls when presented with threat, positive and neutral stimuli under perceptual (lexical decision) and semantic (category decision) task conditions. In Study 1, panic disorder subjects' (n = 14) performance was compared to that of matched normal controls (n = 14) while in Study 2 social phobic subjects (n = 24) were compared to matched normal controls (n = 24). Relative to matched normal controls, panic disorder subjects but not social phobics tended to show greater slowing in performance on the more cognitively complex (category) task. A second finding, consistent across both studies was that, compared to the normal control groups, both panic and social phobic groups showed significantly slowed responses to threat words in both the perceptual and semantic tasks. Such findings are directly counter to the predictions of a mood congruence hypothesis. This apparent contradiction is resolved by a review of the literature which indicates that mood-related facilitation effects are obtained only in tasks which tap awareness of threat information rather than speed of response. It is suggested that while anxiety may produce enhanced awareness of threat, it may inhibit responsiveness to it. The results of these studies are seen as consistent with ethological theories of inhibited motoric responses under certain threat conditions. Furthermore, the findings suggest that caution is indicated in interpreting slowed reaction time to threat stimuli in tasks such as the Stroop color naming task as purely the result of attentional processes.  相似文献   
948.
949.
950.
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