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   452篇
  免费   10篇
  462篇
  2020年   7篇
  2019年   4篇
  2018年   5篇
  2017年   11篇
  2016年   10篇
  2015年   4篇
  2014年   6篇
  2013年   35篇
  2012年   24篇
  2011年   20篇
  2010年   11篇
  2009年   16篇
  2008年   14篇
  2007年   20篇
  2006年   17篇
  2005年   6篇
  2004年   23篇
  2003年   20篇
  2002年   24篇
  2001年   9篇
  2000年   11篇
  1999年   8篇
  1998年   7篇
  1997年   9篇
  1994年   4篇
  1993年   3篇
  1992年   9篇
  1991年   4篇
  1990年   6篇
  1989年   10篇
  1987年   3篇
  1986年   6篇
  1985年   5篇
  1984年   4篇
  1983年   8篇
  1982年   4篇
  1981年   6篇
  1980年   3篇
  1979年   4篇
  1978年   3篇
  1977年   5篇
  1976年   4篇
  1975年   4篇
  1974年   4篇
  1973年   4篇
  1972年   6篇
  1969年   3篇
  1968年   5篇
  1967年   5篇
  1966年   4篇
排序方式: 共有462条查询结果,搜索用时 0 毫秒
41.
42.
Background: Cancer genetic counseling and testing is a standard of care option for appropriate families and can identify individuals at increased risk prior to diagnosis, when prevention or detection strategies are most effective. Despite documented efficacy of cancer risk reduction in high-risk individuals, underserved and minority individuals have a disproportionate cancer burden and limited access to genetic counseling. Methods: A needs assessment survey documented gaps in knowledge and interest in prevention. Satellite clinics were established at two indigent healthcare systems. Cancer genetics CME lectures were conducted and referral guidelines disseminated to clinicians who referred patients for counseling. Results: An increase in clinician knowledge was demonstrated post-CME and reflected by quality referrals. Eighty-eight percent of patients kept their appointments. In the predominantly Latina6 (n=77) clinic population, 71.4% were affected with cancer, and 17 mutation positive families were identified. Preliminary data shows a positive impact on patients' motivation and behavior. The majority has expressed satisfaction and reduction in anxiety. Conclusions: This study demonstrates feasibility and acceptability of cancer genetics services in this population, suggesting the potential to reduce cancer morbidity in underserved, high-risk families.“Latino” is the most common census term for individuals of Spanish, Mexican, Central and South American, Cuban, or Puerto Rican descent, referring to ethnicity, and is generally considered a more ethnically/culturally based term for individuals of the aforementioned groups. As this cohort is female the feminine noun “Latina” is used  相似文献   
43.
Research shows that social work graduate programs offer little education in suicide prevention and intervention, yet social workers' experiences and attitudes regarding suicide education are unknown. This Web-based survey of 598 social workers found that almost all respondents had worked with at least one suicidal client, but most received little, if any, training in suicide prevention or intervention while in graduate school. Respondents largely viewed their social work program's training in suicide prevention and intervention as inadequate. Implications for social work education and practice are discussed.  相似文献   
44.
There are two competing theoretical perspectives on how job tenure might affect job performance. Human capital theory suggests that as knowledge and skill increase with greater tenure, job performance will improve as well. In contrast, the literature on job design suggests that as job tenure increases, employees are likely to become more bored and less motivated at work. Consequently, the gains from human capital acquisition might be offset by losses of motivation. To examine these competing perspectives, we conducted meta-analyses on the relationships of job tenure with four types of job performance: core task performance, citizenship behavior, creativity and innovative behavior, and counterproductive work behavior. The results support the second perspective, as both the linear and curvilinear relationships of job tenure with the four types of job performance are weak. Further, the results do not change in strength across type of research design, job industry, age, or gender.  相似文献   
45.
46.
The present study extended research on contrast effects by (a) examining the effect of context performances on ratings of a target performance when a prior impression of the target performer already exists, and (b) clarifying the issue of whether contrast is caused by attention to context-discrepant behavior or shifts in judgment standards. The results demonstrated that the existence of a prior impression mitigates the influence of context performances on ratings. Judgment standards were found to be unstable and dependent on information provided to raters by the experimental manipulations. Regression analyses showed that both attention and standards of judgment mediate the relationship between context and ratings. Implications of these findings for contrast effects, performance ratings, and the importance of reliable judgment standards for real-world performance appraisals are discussed.  相似文献   
47.
We investigated the sibling relationship as a context for cognitive development. Forty preschoolers (ages 5–6) and their younger siblings (ages 2–3) were visited at home. Four games were presented to the older siblings and they were asked (a) to estimate how well their younger sibling will perform on each game and (b) to teach the younger sibling how to use the games. The older siblings' mediating behaviours during the teaching session and the younger siblings' performance on the four tasks were coded. The frequency of mediating behaviours—including attention focusing, amplifying affect and providing meaning, fostering a sense of competence, regulating of the learning process, de‐contextualization, and negative feedback in the form of mocking and laughing at errors, predicted the younger siblings' task performance. The older sibling's accurate perception of the younger child's competence was uniquely predictive of task performance. The highest amount of mediation was observed in older‐brother–younger‐brother pairs, in particular the behaviours of negative feedback and amplifying affect. Results contribute to the discussion on the role of siblings as moderators of cognitive development and are discussed in terms of Vygotsky's cultural–historical perspective on apprenticeship. Copyright © 2002 John Wiley & Sons, Ltd.  相似文献   
48.
Enforcing Social Conformity: A Theory of Authoritarianism   总被引:5,自引:0,他引:5  
Fifty years after the publication of The Authoritarian Personality, the empirical literature on authoritarianism continues to grow even though there is no widely accepted theory to account for the phenomenon. The absence of a secure theoretical grounding severely limits our understanding of authoritarianism. This paper offers a new conceptualization in which authoritarian predispositions originate in the conflict between the values of social conformity and personal autonomy. Prejudice and intolerance should be observed among those who value social conformity and perceive a threat to social cohesion. These hypotheses were tested with a sample of undergraduate students; the questionnaire included new measures of the dimension of social conformity–autonomy as well as items from Altemeyer's RWA (right–wing authoritarianism) scale.  相似文献   
49.
To examine the coregulation of positive affect during mother–infant and father–infant interactions, 100 couples and their first‐born child were videotaped in face‐to‐face interactions. Parents' and infant's affective states were coded in one‐second frames, and synchrony was measured with time‐series analysis. The orientation, intensity, and temporal pattern of infant positive arousal were assessed. Synchrony between same‐gender parent–infant dyads was more optimal in terms of stronger lagged associations between parent and infant affect, more frequent mutual synchrony, and shorter lags to responsiveness. Infants' arousal during mother–infant interaction cycled between medium and low levels, and high positive affect appeared gradually and was embedded within a social episode. During father–child play, positive arousal was high, sudden, and organized in multiple peaks that appeared more frequently as play progressed. Mother–infant synchrony was linked to the partners' social orientation and was inversely related to maternal depression and infant negative emotionality. Father–child synchrony was related to the intensity of positive arousal and to father attachment security. Results contribute to research on the regulation of positive emotions and describe the unique modes of affective sharing that infants coconstruct with mother and father. ©2003 Michigan Association for Infant Mental Health.  相似文献   
50.
The simplicity principle in human concept learning   总被引:1,自引:0,他引:1  
How do we learn concepts and categories from examples? Part of the answer might be that we induce the simplest category consistent with a given set of example objects. This seemingly obvious idea, akin to simplicity principles in many fields, plays surprisingly little role in contemporary theories of concept learning, which are mostly based on the storage of exemplars, and avoid summarization or overt abstraction of any kind. This article reviews some evidence that complexity minimization does indeed play a central role in human concept learning. The chief finding is that subjects' ability to learn concepts depends heavily on the concepts' intrinsic complexity; more complex concepts are more difficult to learn. This pervasive effect suggests, contrary to exemplar theories, that concept learning critically involves the extraction of a simplified or abstracted generalization from examples.  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