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   36536篇
  免费   680篇
  国内免费   4篇
  37220篇
  2020年   355篇
  2019年   478篇
  2018年   611篇
  2017年   639篇
  2016年   661篇
  2015年   466篇
  2014年   600篇
  2013年   2737篇
  2012年   1064篇
  2011年   1138篇
  2010年   673篇
  2009年   684篇
  2008年   1002篇
  2007年   985篇
  2006年   922篇
  2005年   829篇
  2004年   804篇
  2003年   754篇
  2002年   766篇
  2001年   1078篇
  2000年   994篇
  1999年   759篇
  1998年   434篇
  1997年   364篇
  1996年   348篇
  1992年   600篇
  1991年   586篇
  1990年   554篇
  1989年   563篇
  1988年   564篇
  1987年   533篇
  1986年   548篇
  1985年   594篇
  1984年   489篇
  1983年   466篇
  1982年   402篇
  1981年   380篇
  1979年   555篇
  1978年   407篇
  1976年   384篇
  1975年   464篇
  1974年   520篇
  1973年   543篇
  1972年   431篇
  1971年   402篇
  1970年   404篇
  1969年   422篇
  1968年   503篇
  1967年   431篇
  1966年   435篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
931.
A number of studies have indicated that delinquent adolescents have characteristic value systems. However, most of these studies have adopted a "known-groups" design--that is, they have compared institutionalized delinquents and non-institutionalized adolescents, assuming those adolescents to be non-delinquent. Designs of this type do not distinguish effectively between the statistical effects of delinquency and of institutionalization. In this study, the authors investigated relationships between values and self-reported antisocial behavior in three adolescent groups: 435 school-attending boys, 529 school-attending girls, and 95 delinquent boys in juvenile rehabilitation centers or prisons. The results indicate that antisocial behavior is associated with hedonistic values and a lack of interest in conventional values and social values. These relationships cannot be explained by the institutionalization effects.  相似文献   
932.
Previously published research is examined, and an alternative scoring method for the Motivation Sources Inventory is proposed. The new method, ratio analysis, provides an empirical assessment more consistent with the theoretical framework of the inventory. Theoretical and empirical support for ratio analysis is provided.  相似文献   
933.
Moulden and Persinger recently reported on the emergence of left-ear accuracy during childhood and adolescence. This commentary briefly discusses their findings with reference to previous studies that have reported on dichotic listening paradigms and, in particular, those in which a left-ear focus was used as a behavioral probe sensitive to developmental sex differences.  相似文献   
934.
Diathesis-stress predictions regarding the onset of adolescent major depression and nonmood disorders were tested. Adolescents (N = 1,507) were assessed for dysfunctional attitudes and negative attributional style, as well as current depressive symptoms, current depressive and nondepressive diagnoses, and past and family histories of psychopathology. Approximately 1 year later, participants were reassessed on all measures. Analyses supported A. T. Beck's (1976) theory of depression (at the level of a trend) but not the hopelessness theory of depression. Findings were suggestive of a threshold view of vulnerability to depression; for those who experienced negative life events, depressive onset was related to dysfunctional attitudes but only when dysfunctional attitudes exceeded a certain level (low = intermediate < high). For participants who scored either very high or very low on both dysfunctional attitudes and negative attributional style, nonsignificant findings were obtained.  相似文献   
935.
The mortality rate for male psychoanalysts was compared to that for the general white male population; for male physicians; and for male psychiatrists and neurologists. For psychoanalysts the rate was found to be significantly lower than for any of the other three groups. Several possible explanations for this low mortality rate are considered. Two major factors may be the careful screening of candidates for psychoanalytic training and their personal analysis. Possible methods of controlling for these factors are suggested.  相似文献   
936.
Japanese exhibits two different types of morphological processes. Some morphologically complex predicates are generated within the domain of the lexicon, whereas others are generated outside the domain of the lexicon. An elicited production task involving both types of complex predicates was administered to six Japanese children with specific language impairment (JSLI) and six children with normal language development (JNLD). The JSLI children experienced significant difficulty forming the lexicon-external complex predicates but much less difficulty with the lexicon-internal complex predicates while the performance of the JNLD children exhibited no such asymmetry. These preliminary results suggest that the deficit of SLI affects the ability to construct implicit procedural rules for morphology that are generated outside the lexicon while their lexical operations for morphology that are generated within the domain of the lexicon remain relatively unimpaired.  相似文献   
937.
938.
There is growing evidence that Mexican-American adolescents may be at increased risk for depressive symptoms. We sought to replicate and explain this result in a study of adolescent girls attending an obstetric-gynecologic clinic. Three hundred and four girls of diverse ethnic backgrounds completed measures of depressive symptoms, negative attributional style, and locus of control. Consistent with predictions, we found that Mexican-American adolescent girls reported more depressive symptoms than adolescent girls from other ethnic backgrounds, and that Mexican-American adolescent girls displayed more negative cognitive styles than girls from other ethnic backgrounds. Depression differences appeared to be partly explained by differences in negative cognitive style. Implications of the results for a theory of increased Mexican-American adolescent depression, and for applied work, were discussed.  相似文献   
939.
Obsessions are a key feature of obsessive-compulsive disorder (OCD), and chronic worry is the cardinal feature of generalized anxiety disorder (GAD). However, these two cognitive processes are conceptually very similar, and there is a need to determine how they differ. Recent studies have attempted to identify cognitive processes that may be differentially related to obsessive features and worry. In the current study we proposed that (1) obsessive features and worry could be differentiated and that (2) a measure of the cognitive process thought-action fusion would distinguish between obsessive features and worry, being strongly related to obsessive features after controlling for the effects of worry. These hypotheses were supported in a sample of 173 undergraduate students. Thought-action fusion may be a valuable construct in differentiating between obsessive features and worry.  相似文献   
940.
Patterns of recovery from sexual and nonsexual assault were examined. Two studies containing data from female victims of these assaults were analyzed. In Study 1, victims (N = 101) underwent 12 weekly assessments with measures of posttraumatic stress disorder (PTSD), depression, and state anxiety. In Study 2, victims (N = 108) underwent monthly assessments on the same measures. The authors examined the effects of type of trauma and time of peak reaction on long-term recovery using intraindividual analysis of change. In both studies, initial and peak reactions of rape victims were more severe than were those of nonsexual assault victims on all measures of psychopathology. Victims with delayed peak reaction exhibited more severe pathology at the final assessment than did victims with early peak reaction. Results of Study 2 indicated a slower recovery rate from sexual than nonsexual assault; in Study 1 a similar pattern of recovery emerged. The advantages of an individual-focused, longitudinal approach to recovery from a trauma are discussed.  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