全文获取类型
收费全文 | 170360篇 |
免费 | 7651篇 |
国内免费 | 157篇 |
出版年
2020年 | 2770篇 |
2019年 | 3426篇 |
2018年 | 3417篇 |
2017年 | 3871篇 |
2016年 | 4561篇 |
2015年 | 3914篇 |
2014年 | 4783篇 |
2013年 | 23393篇 |
2012年 | 4365篇 |
2011年 | 3384篇 |
2010年 | 3767篇 |
2009年 | 4716篇 |
2008年 | 3648篇 |
2007年 | 3152篇 |
2006年 | 3806篇 |
2005年 | 3839篇 |
2004年 | 3360篇 |
2003年 | 3002篇 |
2002年 | 2793篇 |
2001年 | 3061篇 |
2000年 | 2900篇 |
1999年 | 2954篇 |
1998年 | 2796篇 |
1997年 | 2639篇 |
1996年 | 2562篇 |
1995年 | 2388篇 |
1994年 | 2356篇 |
1993年 | 2313篇 |
1992年 | 2500篇 |
1991年 | 2356篇 |
1990年 | 2196篇 |
1989年 | 2151篇 |
1988年 | 2094篇 |
1987年 | 2156篇 |
1986年 | 2147篇 |
1985年 | 2379篇 |
1984年 | 2489篇 |
1983年 | 2260篇 |
1982年 | 2355篇 |
1981年 | 2331篇 |
1980年 | 2156篇 |
1979年 | 2177篇 |
1978年 | 2144篇 |
1977年 | 2142篇 |
1976年 | 1917篇 |
1975年 | 2008篇 |
1974年 | 2050篇 |
1973年 | 1955篇 |
1972年 | 1548篇 |
1971年 | 1511篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
871.
872.
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
873.
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
874.
N E Adler H P David B N Major S H Roth N F Russo G E Wyatt 《The American psychologist》1992,47(10):1194-1204
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
875.
876.
Marylene Cloitre Richard G. Heimberg Craig S. Holt Michael R. Liebowitz 《Behaviour research and therapy》1992,30(6):609-617
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
877.
878.
879.
880.
Diane M. Sainato Howard Goldstein Phillip S. Strain 《Journal of applied behavior analysis》1992,25(1):127-141
This study investigated effects of a self-evaluation procedure on preschool children's use of social interaction strategies among their classmates with autism. Three triads of children (comprised of 1 trained normally developing peer, 1 untrained peer, and 1 child with autism) participated. A multiple baseline design across subjects was used to demonstrate that peers who were taught facilitative strategies increased their use of strategies only after the self-evaluation intervention was introduced. Improvements in social behavior of children with autism was associated with peers' increased strategy use. Untrained peers demonstrated little change in their social behavior. Treatment effects were replicated when trained peers were asked to use self-evaluation with other children with autism during other play times. Self-evaluation procedures enhanced the use of social interaction strategies on the part of normally developing peers during social skills interventions. 相似文献