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   1613篇
  免费   99篇
  国内免费   2篇
  2023年   26篇
  2022年   15篇
  2021年   46篇
  2020年   56篇
  2019年   57篇
  2018年   62篇
  2017年   77篇
  2016年   68篇
  2015年   39篇
  2014年   55篇
  2013年   206篇
  2012年   73篇
  2011年   76篇
  2010年   58篇
  2009年   47篇
  2008年   70篇
  2007年   63篇
  2006年   64篇
  2005年   54篇
  2004年   35篇
  2003年   40篇
  2002年   40篇
  2001年   22篇
  2000年   26篇
  1999年   19篇
  1998年   23篇
  1997年   11篇
  1996年   17篇
  1995年   14篇
  1994年   11篇
  1993年   10篇
  1992年   16篇
  1991年   14篇
  1989年   11篇
  1988年   7篇
  1986年   7篇
  1985年   8篇
  1984年   8篇
  1982年   11篇
  1981年   13篇
  1979年   7篇
  1978年   9篇
  1977年   9篇
  1976年   13篇
  1974年   8篇
  1973年   6篇
  1972年   5篇
  1971年   5篇
  1968年   5篇
  1966年   5篇
排序方式: 共有1714条查询结果,搜索用时 15 毫秒
131.
The present study investigated the degree to which learning sets developed during formation of 20 successive concepts. Forty S s were evenly distributed among eight experimental conditions. Conditions compared were rule with attribute identification, conjunctive with disjunctive concepts, and random with ordered arrays of figures. Results showed that learning sets formed with rule identification for both conjunctive and disjunctive concepts, but not with attribute identification. Concepts were easier to learn when using systematic compared to random arrays of figures (of questionable significance), when forming conjunctive rather than disjunctive concepts (not significant), and when using rule identification instead of attribute identification. Procedural differences among studies in this area appear to be major contributors to differences among studies in the results found.  相似文献   
132.
In the categorical approach to the foundations of quantum theory, one begins with a symmetric monoidal category, the objects of which represent physical systems, and the morphisms of which represent physical processes. Usually, this category is taken to be at least compact closed, and more often, dagger compact, enforcing a certain self-duality, whereby preparation processes (roughly, states) are interconvertible with processes of registration (roughly, measurement outcomes). This is in contrast to the more concrete “operational” approach, in which the states and measurement outcomes associated with a physical system are represented in terms of what we here call a convex operational model: a certain dual pair of ordered linear spaces–generally, not isomorphic to one another. On the other hand, state spaces for which there is such an isomorphism, which we term weakly self-dual, play an important role in reconstructions of various quantum-information theoretic protocols, including teleportation and ensemble steering. In this paper, we characterize compact closure of symmetric monoidal categories of convex operational models in two ways: as a statement about the existence of teleportation protocols, and as the principle that every process allowed by that theory can be realized as an instance of a remote evaluation protocol—hence, as a form of classical probabilistic conditioning. In a large class of cases, which includes both the classical and quantum cases, the relevant compact closed categories are degenerate, in the weak sense that every object is its own dual. We characterize the dagger-compactness of such a category (with respect to the natural adjoint) in terms of the existence, for each system, of a symmetric bipartite state, the associated conditioning map of which is an isomorphism.  相似文献   
133.
This experiment investigated several underlying assumptions and one aspect of the validity of the Luscher Color Test, a projective test developed in Europe and relatively unknown in the United States. It was predicted that Ss would report increases in “negative” feelings to the color red, while blue would have the opposite effect, and yellow would produce an increase in “positive” feelings. Twenty-three male and 23 female Ss rated their immediate reactions to the LCT colors on seven mood adjectives, following which they were given the short version LCT and the IPAT Anxiety Scale. The results supported the hypotheses regarding blue and yellow, but not those regarding red nor the validity of the LCT as an anxiety measuring instrument.  相似文献   
134.
This study reports on the development of the Multicultural Personality Questionnaire–Short Form among 511 participants. Using a split-sample scale validation design, Study 1 (N = 260) employed a principal component analysis and rigorous item selection criteria to extract a 40-item short form (MPQ–SF) from the original 91-item Multicultural Personality Questionnaire (MPQ; van der Zee & van Oudenhoven, 2000, 2001). In Study 2 (N = 251), the MPQ–SF was subjected to confirmatory factor analysis and resulted in a reasonably good fit to the data (comparative fit index = .94; root mean squared error of approximation = .066). Satisfactory coefficient alphas and high correlations with the original scales were found. Moreover, relationships with related scales were largely in the predicted direction. Specific directions for follow-up research are posited.  相似文献   
135.
The aim of the current study was to examine the relationship between motor coordination and visual working memory in children aged 5–11 years. Participants were 18 children with movement difficulty and 41 control children, assessed at baseline and following an 18-month time period. The McCarron Assessment of Neuromuscular Development provided a measure of motor skills and the CogState One-Back task was used to assess visual working memory. Multi-level mixed effects linear regressions were used to assess the relationship between fine motor skills, gross motor skills, and visual working memory. The results revealed that for children with movement difficulty, better fine motor skills at baseline significantly predicted greater One-Back accuracy and greater (i.e., faster) speed at 18-month follow-up. Conversely, fine motor skills at baseline did not predict One-Back accuracy and speed for control children. However, for both groups, greater One-Back accuracy at baseline predicted better fine and gross motor skills at follow-up. These findings have important implications for the assessment and treatment of children referred for motor difficulties and/or working memory difficulties.  相似文献   
136.
This investigation sought to assess the congruence of the trait emotional intelligence (EI) sampling domain, reflected in the short form of the Trait Emotional Intelligence Questionnaire (TEIQue; Petrides & Furnham, 2006), with the theoretical content of trait EI—namely, the range of personality traits implicated in emotions. First, associations of the TEIQue factors with Emotion-Oriented Coping (EOC) and Social Coping (SC) were compared. Three of the four TEIQue factors were stronger predictors of EOC than SC; only the Emotionality factor was a stronger predictor of SC. Also, Emotionality did not add to the prediction of EOC in a simultaneous regression with the other factors. Secondly, by means of Structural Equation Modelling, the 30-item composite and a theoretically altered 16-item composite were compared as mediators between the Big Five and the emotion-laden dimension of mental health. Even though all interpersonal items (i.e., those pertaining to Sociability and Emotionality) were omitted for the altered composite, it outperformed the original composite in predicting a latent mental health composite of Stress, Anxiety, and EOC. The results highlight the distinct nature of Emotionality and Sociability facets and have implications for the refinement of the trait EI content domain.  相似文献   
137.
ABSTRACT

The purpose of this effort is to broaden the scope with which body dissatisfaction (BD) is viewed to inform the practices of MFTs. Associations between college students' BD and measures of depression, anxiety, self-esteem, and body image were tested using mean-level comparisons, path analysis, and multi-group tests by sex, across ethnic/racial groups, and across immigration status. Data were collected from N = 10,573 youth. There was evidence of significant mean level differences, and BD predicted internalizing symptoms while multi-group tests were largely invariant suggesting a more universal impact than dominant theoretical explanations (i.e. Objectification theory) posit.  相似文献   
138.
The Implicit Association Test (Greenwald, McGhee, & Schwartz, 1998) has become a popular tool for measuring implicit attitudes toward 2 contrasting concepts. In this study, we suggest including a neutral category (trees) to capture implicit evaluations of a single target attitude object. Using such a technique to measure implicit attitudes toward condoms, we predicted and found that explicit attitudes were related to intended condom use in situations that allow for controlled and deliberative processing, but implicit attitudes were related to intended condom use when automatic processing presides. Implications for such implicit and explicit attitude-behavior relations are discussed in the context of sexual risk-taking.  相似文献   
139.
140.
Previous studies suggest that both reward anticipation and expected or experienced conflicts activate cognitive control. The present study investigated how these factors interact during conflict processing. In two experiments, participants performed a variant of the Stroop task, receiving performance-dependent monetary rewards in some blocks. In addition, we manipulated the level of conflict-triggered reactive and expectancy-driven proactive control: In Experiment 1, we compared the Stroop effect after previously congruent and incongruent trials to examine the conflict adaptation effect (reactive control). We found that the level of motivation did not interact with conflict adaptation. In Experiment 2, we varied the proportion of congruent and incongruent trials to manipulate conflict expectancy (proactive control). The data suggest the effects of motivation to be less pronounced under conditions of high conflict expectancy. We conclude that the interaction of motivation with cognitive determinants of control depends on whether these activate proactive or reactive control processes.  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