全文获取类型
收费全文 | 7390篇 |
免费 | 379篇 |
国内免费 | 7篇 |
出版年
2023年 | 74篇 |
2022年 | 105篇 |
2021年 | 130篇 |
2020年 | 185篇 |
2019年 | 194篇 |
2018年 | 339篇 |
2017年 | 310篇 |
2016年 | 323篇 |
2015年 | 207篇 |
2014年 | 231篇 |
2013年 | 927篇 |
2012年 | 500篇 |
2011年 | 524篇 |
2010年 | 320篇 |
2009年 | 247篇 |
2008年 | 459篇 |
2007年 | 378篇 |
2006年 | 330篇 |
2005年 | 305篇 |
2004年 | 215篇 |
2003年 | 230篇 |
2002年 | 201篇 |
2001年 | 78篇 |
2000年 | 112篇 |
1999年 | 70篇 |
1998年 | 54篇 |
1997年 | 36篇 |
1996年 | 42篇 |
1995年 | 35篇 |
1994年 | 26篇 |
1993年 | 33篇 |
1992年 | 39篇 |
1991年 | 28篇 |
1990年 | 36篇 |
1989年 | 32篇 |
1988年 | 32篇 |
1987年 | 21篇 |
1986年 | 15篇 |
1985年 | 19篇 |
1984年 | 30篇 |
1983年 | 23篇 |
1982年 | 14篇 |
1980年 | 18篇 |
1979年 | 21篇 |
1978年 | 18篇 |
1976年 | 22篇 |
1974年 | 14篇 |
1973年 | 14篇 |
1972年 | 13篇 |
1971年 | 18篇 |
排序方式: 共有7776条查询结果,搜索用时 15 毫秒
941.
Although creativity has drawn the attention of researchers during the past century, collaborative processes have barely been investigated. In this article, the collective dimension of a creative process is investigated, based on a dynamic and ecological approach that includes an affective component. Dynamic means that the creative process is no longer considered as sequential, and ecological, that the individuals were observed in their normal place of creation. This study was conducted with science students that were required to carry on a research project during 15 weeks in small groups. The results tend to confirm the hypothesis of a nonlinear process, with important variations of the affects depending on the stage. Moreover, each group creative process seems to be specific. The relation between the social functioning of the group and the process is also discussed. Finally, because it is a part of any teamwork, verbalization is proposed as a new powerful tool to investigate creative process. 相似文献
942.
Spinal muscular atrophy (SMA) is an autosomal recessive neuromuscular condition with degeneration of the anterior horn cells in the spinal column. Five SMA subtypes exist with classification dependent upon the motor milestones achieved. Study of the SMN1 (survival motor neuron) and SMN2 genes as well as the concepts of the “2?+?0” carriers, gene conversion, de novo mutations and intragenic mutations allow for a better understanding of SMA. Detailing the carrier and diagnostic testing options further deepens the genetic counselor’s knowledge of SMA. A review of care guidelines and research options is included as this information gives a patient a well-rounded view of SMA. Although SMA is most commonly associated with the SMN1 gene, a number of spinal muscular atrophies not caused by genetic changes in this gene may be included as differential diagnoses until confirmatory testing can be completed. SMA is a complex condition requiring a detailed knowledge on the genetic counselor’s part in order to explain the disorder to the patient with clarity thus facilitating increased communication and decision making guidance with the patient. 相似文献
943.
Ana?XavierEmail author Marina?Cunha José?Pinto-Gouveia 《Journal of child and family studies》2016,25(5):1451-1460
The present study examines whether early experiences of threat, subordination and devaluation with family influence adolescents’ negative emotional states and subsequently deliberate self-harm; and if this effect is conditioned by daily peer hassles. The sample consisted of 441 adolescents (57.6 % female) with ages between 13 and 18 years old from middle and high schools. Participants completed self-report instruments measuring early memories of threat, subordination and devaluation, daily peer hassles, negative affect and deliberate self-harm behaviors. Results from conditional process analysis showed that adolescents who feel devalued and experience threat and submission within family tend to endorse high levels of negative affect, which in turn accounts for increased endorsements on deliberate self-harm. Moreover, the impact of negative affect on deliberate self-harm is amplified by the presence of moderate and high levels of daily peer hassles. This study suggests the relevance of assessing and intervening on type of emotional memories (i.e., threat, subordination and devaluation), daily disruptions with peers and negative emotional states with adolescents who self-injure. These findings may be useful in the development of preventive and intervention programs for reducing deliberate self-harm in adolescence. 相似文献
944.
Camilla Jalling Maria Bodin Anders Romelsjö Håkan Källmén Natalie Durbeej Anders Tengström 《Journal of child and family studies》2016,25(3):811-826
Two theoretically based parent training programs, delivered in real-world settings by the social services, were examined in this randomized controlled trial for effectiveness in reducing adolescents’ antisocial behavior and substance use. Two hundred and thirty-seven (237) adolescents in ages between 12 and 18 and their parents were assigned to one of two programs or to a wait-list control condition. The programs were the nine weekly group sessions program Comet 12–18 (Swedish Parent Management Training Program) and the six weekly ParentSteps (Swedish shortened version by Strengthening Families Program 10–14). Outcome measures were antisocial behavior, substance use, and delinquency, and psychosocial dysfunction. Data based on adolescents’ and parents’ ratings of the adolescents’ problem behavior at baseline and 6 months later were analyzed with repeated measures ANVOA, Logistic regression, and Kruskal–Wallis H test. The results showed that parents’ ratings of adolescents’ antisocial behaviors decreased significantly over time, but no time by group effect emerged. No program effects were found in the adolescents’ self-reported antisocial behavior, delinquency, or psychosocial functioning. A threefold risk of illicit drug use was found in both intervention groups. The results suggest that neither Comet nor ParentSteps had beneficial effects on adolescent’s antisocial or delinquent behavior, or on alcohol use. The only significant group difference found was a threefold risk of drug use in the intervention adolescents at follow-up, but for several reasons this finding should be interpreted with caution. Trial registration number: ISRCTN76141538. 相似文献
945.
The wraparound process aims to provide an effective practice-level approach to coordinating care for youths with complex behavioral health needs, and reformed system structures to support such integration of care. The current study provides an update to two prior surveys of state children’s mental health directors, completed in 1998 and 2007, on the extent of wraparound implementation in the United States and implementation supports that have been employed. Results from 2013 found that 100 % of states reported having some type of wraparound program that conformed to the definition and yielded an estimate of 75,000 children and families served via wraparound in that year. States reported a continued increase in use of wraparound standards; however, fewer states reported collection of fidelity data, and availability of internal resources for training and coaching. Over three-quarters of states reported availability of parent to parent peer support, and 46 % of states are supporting wraparound implementation by blending or braiding funding across child-serving systems. Results also revealed that 61 % of states had a centralized oversight entity for wraparound, an important finding given that such “statewideness” was also associated with more youth served, greater accountability, use of standards, and other implementation supports. 相似文献
946.
947.
948.
Joshua M. Nadeau Nicole M. McBride Brittney F. Dane Amanda B. Collier Amanda C. Keene Leah E. Hacker Mark A. Cavitt Jeffrey L. Alvaro Eric A. Storch 《Journal of child and family studies》2016,25(4):1229-1234
The primary objective of this study was to examine the psychometric properties of a measure of anger/rage attacks—the Rage Outburst and Anger Rating Scale (ROARS)—in a sample of youth (n = 81, ages 7–17 years, 72.8 % male) receiving treatment at an outpatient pediatric psychiatric clinic. A trained rater completed the ROARS and Clinical Global Impression-Rage (CGI-Rage). Children completed the Spence Children’s Anxiety Scale for Children and Center for Epidemiological Studies Depression Scale. Parents completed the Spence Children’s Anxiety Scale for Parents. Internal consistency (α = .89), inter-rater reliability (κ = .94) and 1-week test–retest reliability (r = .72) were calculated for the ROARS. The ROARS was correlated with CGI-Rage (r = .68, ρ < .001), although not with parent- and child-rated anxiety symptoms or with child-rated depressive symptoms. Implications regarding clinical utility of the ROARS and directions for future research are discussed. 相似文献
949.
This article deals with a modern disease of academic science that consists of an enormous increase in the number of scientific publications without a corresponding advance of knowledge. Findings are sliced as thin as salami and submitted to different journals to produce more papers. If we consider academic papers as a kind of scientific ‘currency’ that is backed by gold bullion in the central bank of ‘true’ science, then we are witnessing an article-inflation phenomenon, a scientometric bubble that is most harmful for science and promotes an unethical and antiscientific culture among researchers. The main problem behind the scenes is that the impact factor is used as a proxy for quality. Therefore, not only for convenience, but also based on ethical principles of scientific research, we adhere to the San Francisco Declaration on Research Assessment when it emphasizes “the need to eliminate the use of journal-based metrics in funding, appointment and promotion considerations; and the need to assess research on its own merits rather on the journal in which the research is published”. Our message is mainly addressed to the funding agencies and universities that award tenures or grants and manage research programmes, especially in developing countries. The message is also addressed to well-established scientists who have the power to change things when they participate in committees for grants and jobs. 相似文献
950.
Investigating cognitive transfer within the framework of music practice: genetic pleiotropy rather than causality
下载免费PDF全文
![点击此处可从《Developmental science》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Miriam A. Mosing Guy Madison Nancy L. Pedersen Fredrik Ullén 《Developmental science》2016,19(3):504-512
The idea of far transfer effects in the cognitive sciences has received much attention in recent years. One domain where far transfer effects have frequently been reported is music education, with the prevailing idea that music practice entails an increase in cognitive ability (IQ). While cross‐sectional studies consistently find significant associations between music practice and IQ, randomized controlled trials, however, report mixed results. An alternative to the hypothesis of cognitive transfer effects is that some underlying factors, such as shared genes, influence practice behaviour and IQ causing associations on the phenotypic level. Here we explored the hypothesis of far transfer within the framework of music practice. A co‐twin control design combined with classical twin‐modelling based on a sample of more than 10,500 twins was used to explore causal associations between music practice and IQ as well as underlying genetic and environmental influences. As expected, phenotypic associations were moderate (r = 0.11 and r = 0.10 for males and females, respectively). However, the relationship disappeared when controlling for genetic and shared environmental influences using the co‐twin control method, indicating that a highly practiced twin did not have higher IQ than the untrained co‐twin. In line with that finding, the relationship between practice and IQ was mostly due to shared genetic influences. Findings strongly suggest that associations between music practice and IQ in the general population are non‐causal in nature. The implications of the present findings for research on plasticity, modularity, and transfer are discussed. 相似文献