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   1053篇
  免费   28篇
  2022年   10篇
  2021年   14篇
  2020年   17篇
  2019年   14篇
  2018年   26篇
  2017年   36篇
  2016年   26篇
  2015年   11篇
  2014年   13篇
  2013年   108篇
  2012年   27篇
  2011年   41篇
  2010年   20篇
  2009年   29篇
  2008年   32篇
  2007年   31篇
  2006年   25篇
  2005年   24篇
  2004年   42篇
  2003年   22篇
  2002年   26篇
  2001年   30篇
  2000年   31篇
  1999年   40篇
  1998年   25篇
  1997年   19篇
  1996年   15篇
  1995年   20篇
  1994年   21篇
  1993年   21篇
  1992年   18篇
  1991年   21篇
  1990年   16篇
  1989年   9篇
  1988年   7篇
  1987年   9篇
  1986年   8篇
  1985年   9篇
  1984年   9篇
  1980年   7篇
  1978年   10篇
  1977年   6篇
  1975年   9篇
  1974年   14篇
  1973年   10篇
  1972年   8篇
  1970年   10篇
  1968年   11篇
  1967年   9篇
  1966年   11篇
排序方式: 共有1081条查询结果,搜索用时 15 毫秒
141.
Asthma remains the most prevalent chronic illness among children. Despite the substantial body of literature examining children with asthma, few studies have examined parents’ perspectives of the condition and experiences of caregiver stress. Parents of children with chronic illnesses experience elevated stress and may have limited opportunities to cope with complex emotions while caring for children with asthma. Drawing from focus groups and interviews with African American and Hispanic parents of children with asthma, this qualitative study was conducted as part of a patient-centered engagement process to inform the refinement of an intervention aimed at reducing stress among parents of children with asthma. All data were transcribed and underwent three waves of inductive analysis. The content analysis indicated that the unpredictable nature of asthma and the caregiving burden associated with managing children’s asthma contributed to parents’ stress, and external contexts compounded the impact of these stressors. Parents also reported having difficulty identifying how they coped with stress and employed approaches to coping with stress that they applied intermittently but encountered several barriers to enacting known or available coping strategies. Analyses also revealed that parents desired a multimodal stress reduction intervention that emphasized building relationships, allowed for flexibility, and encouraged staff-parent communication. Whereas African American and Hispanic parents’ experiences of stress and coping strategies were similar, their preferences differed in regards to incorporating technology into the intervention, the credentials of facilitators, and the salience of language preferences. Understanding the complexities of stressors facing caregivers is important for developing interventions to support parents and children coping with asthma, and in particular when working with families from diverse backgrounds.  相似文献   
142.
Foundations of Mathematics: Metaphysics, Epistemology, Structure   总被引:1,自引:0,他引:1  
Since virtually every mathematical theory can be interpreted in set theory, the latter is a foundation for mathematics. Whether set theory, as opposed to any of its rivals, is the right foundation for mathematics depends on what a foundation is for. One purpose is philosophical, to provide the metaphysical basis for mathematics. Another is epistemic, to provide the basis of all mathematical knowledge. Another is to serve mathematics, by lending insight into the various fields. Another is to provide an arena for exploring relations and interactions between mathematical fields, their relative strengths, etc. Given the different goals, there is little point to determining a single foundation for all of mathematics.  相似文献   
143.
This study uses semi-structured interviews to examine how 16 people of Latvian heritage negotiated their cultural identities in high school (retrospectively) and at midlife (concurrently). Participants' high school and midlife cultural identity patterns were coded as marginalized, separated, assimilated, alternating integrated, or blended integrated. Although eleven participants were found to have had marginalized, separated, or alternating integrated patterns in high school, all 16 had either assimilated or blended integrated patterns at midlife. Further, there is evidence that the contexts in which identity negotiation occurred—specifically, the rigidity of the participants' Latvian and American contexts in high school and their relative openness at midlife—influenced these changes in pattern. The findings also underscore the importance of taking into account within-group differences when studying how people negotiate their cultural identities.  相似文献   
144.
145.
The assumption in some current theories of probabilistic categorization is that people gradually attenuate their learning in response to unavoidable error. However, existing evidence for this error discounting is sparse and open to alternative interpretations. We report 2 probabilistic-categorization experiments in which we investigated error discounting by shifting feedback probabilities to new values after different amounts of training. In both experiments, responding gradually became less responsive to errors, and learning was slowed for some time after the feedback shift. Both results were indicative of error discounting. Quantitative modeling of the data revealed that adding a mechanism for error discounting significantly improved the fits of an exemplar-based and a rule-based associative learning model, as well as of a recency-based model of categorization. We conclude that error discounting is an important component of probabilistic learning.  相似文献   
146.
Many kinds of creativity result from combination of mental representations. This paper provides a computational account of how creative thinking can arise from combining neural patterns into ones that are potentially novel and useful. We defend the hypothesis that such combinations arise from mechanisms that bind together neural activity by a process of convolution, a mathematical operation that interweaves structures. We describe computer simulations that show the feasibility of using convolution to produce emergent patterns of neural activity that can support cognitive and emotional processes underlying human creativity.  相似文献   
147.
We examined whether temporal integration of face parts reflects holistic processing or response interference. Participants learned to name two faces “Fred” and two “Bob.” At test, the top and bottom halves of different faces formed composites and were presented briefly separated in time. Replicating prior findings (Singer & Sheinberg, Vision Research, 46, 1838–1847, 2006), naming of the target half for aligned composites was slowed when the irrelevant half was from a face with a different name rather than from the original face. However, no interference was observed when the irrelevant half had a name identical to the name of the target half but came from a different learned face, arguing against a true holistic effect. Instead, response interference was obtained when the target half briefly preceded the irrelevant half. Experiment 2 confirmed a double dissociation of holistic processing versus response interference for intact faces versus temporally separated face halves, suggesting that simultaneous presentation of facial information is critical for holistic processing.  相似文献   
148.
Relations between the emotional health domain of the Gallup-Healthways Well-Being Index and the Big Five personality factors were determined at the American state level. State emotional health scores were based on the aggregated results of 353,039 phone interviews conducted throughout 2008 with a representative sample of US adults (Gallup 2009a). State z scores (Rentfrow et al. in Perspectives on Psychological Science, 3, 339–386, 2008) on neuroticism, extraversion, agreeableness, conscientiousness, and openness were based on 619,397 nationally representative respondents to an internet survey between 1999 and 2005. State socioeconomic status (SES), urban percent, and white percent based on 2000 and 2005 data served as demographic controls. Alaska and Hawaii were excluded. When the controls entered a hierarchical multiple regression equation as a block and were followed by the Big Five selected stepwise, the controls accounted for 27.5% of the emotional health variance and neuroticism accounted for another 35.3%. With stepwise selection of controls and then Big Five variables, SES entered first (24.1%) and neuroticism entered second (32.4%). With stepwise selection from the combined control and Big Five pool, neuroticism entered first (47.5%), SES entered second (9.1%), and urban percent entered third (4.9%). Clearly, neuroticism and SES are the key contributors to emotional health variance and neuroticism makes the largest contribution. States with higher proportions of neurotic individuals and lower SES tended to have populations with poorer emotional health. Theoretical foundations for the link between neuroticism and emotional health at the state level and implications for changes in state emotional health are discussed.  相似文献   
149.
Parents may be reluctant to treat the feeding disorder of a chronically ill child who exhibits distressed behavior during feeding. In this study, we identified a child with chronic medical problems and a feeding disorder who cried during feedings. We introduced treatment components sequentially to address parental concerns about crying. First, we used a pacifier to reduce crying, and then we used a flipped spoon to increase mouth clean. The results showed that a sequential approach to treatment can be effective for children with complex medical and behavioral problems.  相似文献   
150.
The utility of the self-report Children’s Anxiety and Pain Scale Anxiety subscale (CAPS-A) in comparison to the widely used, observer-rated Modified Yale Preoperative Anxiety Scale (mYPAS) in assessing anxiety in children undergoing day surgery procedures was examined. The CAPS-A test-retest reliability, concurrent validity with the Modified Yale Preoperative Anxiety Scale (mYPAS), and sensitivity to expected increases in anxiety at stressful times during the preoperative period were examined. Levels of observer-rated (mYPAS) and self-reported anxiety (CAPS-A) were obtained from 61 children (3 to 6 years) undergoing day surgery procedures. The CAPS-A demonstrated adequate test-retest reliability. Concurrent validity between the CAPS-A and mYPAS scores was poor. The CAPS-A failed to show sensitivity to the expected increases in anxiety at stressful time-points. Thus, an alternative scoring strategy for the CAPS-A was proposed (i.e., child’s refusal to point was scored as high anxiety). Post-hoc analyses demonstrated good concurrent and adequate convergent validity with the alternative scoring strategy.  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