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   1865篇
  免费   88篇
  1953篇
  2023年   12篇
  2022年   33篇
  2021年   35篇
  2020年   49篇
  2019年   61篇
  2018年   65篇
  2017年   86篇
  2016年   90篇
  2015年   69篇
  2014年   79篇
  2013年   219篇
  2012年   117篇
  2011年   113篇
  2010年   74篇
  2009年   69篇
  2008年   97篇
  2007年   84篇
  2006年   78篇
  2005年   65篇
  2004年   63篇
  2003年   49篇
  2002年   51篇
  2001年   15篇
  2000年   24篇
  1999年   15篇
  1998年   15篇
  1997年   15篇
  1996年   10篇
  1995年   9篇
  1994年   10篇
  1993年   11篇
  1991年   8篇
  1990年   6篇
  1989年   6篇
  1988年   8篇
  1987年   6篇
  1986年   16篇
  1985年   5篇
  1984年   4篇
  1983年   12篇
  1982年   13篇
  1981年   12篇
  1979年   8篇
  1978年   4篇
  1977年   4篇
  1976年   9篇
  1975年   4篇
  1974年   8篇
  1971年   5篇
  1970年   4篇
排序方式: 共有1953条查询结果,搜索用时 15 毫秒
911.
Visual stimuli are often processed more efficiently than accompanying stimuli in another modality. In line with this “visual dominance”, earlier studies on attentional switching showed a clear benefit for visual stimuli in a bimodal visual–auditory modality-switch paradigm that required spatial stimulus localization in the relevant modality. The present study aimed to examine the generality of this visual dominance effect. The modality appropriateness hypothesis proposes that stimuli in different modalities are differentially effectively processed depending on the task dimension, so that processing of visual stimuli is favored in the dimension of space, whereas processing auditory stimuli is favored in the dimension of time. In the present study, we examined this proposition by using a temporal duration judgment in a bimodal visual–auditory switching paradigm. Two experiments demonstrated that crossmodal interference (i.e., temporal stimulus congruence) was larger for visual stimuli than for auditory stimuli, suggesting auditory dominance when performing temporal judgment tasks. However, attention switch costs were larger for the auditory modality than for visual modality, indicating a dissociation of the mechanisms underlying crossmodal competition in stimulus processing and modality-specific biasing of attentional set.  相似文献   
912.
913.
An essential aspect of voluntary action control is the ability to predict the perceptual effects of our actions. Although the influence of action-effect prediction on humans’ behavior and perception is unequivocal, it remains unclear when action-effect prediction is generated by the brain. The present study investigates the dynamics of action effect anticipation by tracing the time course of its perceptual consequences. Participants completed an acquisition phase during which specific actions (left and right key-presses) were associated with specific visual effects (upward and downward dots motion). In the test phase they performed a 2 AFC identification task in which they were required to indicate whether the dots moved upward or downward. To isolate any effects of action-effect prediction on perception, participants were presented with congruent and incongruent dot motion in which the association participants learned in the previous acquisition phase was respected and violated, respectively. Crucially, to assess the temporal dynamics of action prediction, congruent and incongruent stimuli were presented at different intervals before or after action execution. We observed higher sensitivity (d′) to motion discrimination in congruent vs. incongruent trials only when stimuli were presented from about 220 ms before the action to 280 ms after the action. The temporal dynamics of our effect suggest that action-effect prediction modulates perception at later stages of motor preparation.  相似文献   
914.
Morbidity and mortality are reliably lower for the married compared with the unmarried across a variety of illnesses. What is less well understood is how a couple uses their relationship for recommended lifestyle changes associated with decreased risk for illness. Partners for Life compared a patient and partner approach to behavior change with a patient only approach on such factors as exercise, nutrition, and medication adherence. Ninety‐three patients and their spouses/partners consented to participate (26% of those eligible) and were randomized into either the individual or couples condition. However, only 80 couples, distributed across conditions, contributed data to the analyses, due to missing data and missing data points. For exercise, there was a significant effect of couples treatment on the increase in activity and a significant effect of couples treatment on the acceleration of treatment over time. In addition, there was an interaction between marital satisfaction and treatment condition such that patients who reported higher levels of marital distress in the individuals condition did not maintain their physical activity gains by the end of treatment, while both distressed and nondistressed patients in the couples treatment exhibited accelerating gains throughout treatment. In terms of medication adherence, patients in the couples treatment exhibited virtually no change in medication adherence over time, while patients in the individuals treatment showed a 9% relative decrease across time. There were no condition or time effects for nutritional outcomes. Finally, there was an interaction between baseline marital satisfaction and treatment condition such that patients in the individuals condition who reported lower levels of initial marital satisfaction showed deterioration in marital satisfaction, while non satisfied patients in the couples treatment showed improvement over time.  相似文献   
915.
Medicating ADHD is a controversial subject that was acutely inflamed in 1995 when high rates of ADHD diagnosis and treatment were documented in southeastern Virginia. Psychologists in southeastern Virginia formed a regional school health coalition to implement and evaluate interventions to address the problem. Other professionals with strong ties to the pharmaceutical industry launched ad hominem attacks on the coalition’s research and work. These attacks contributed to the work being terminated in 2005. In the ensuing years, ADHD drug treatment continued to escalate. Today, the national rate of ADHD diagnosis exceeds all reasonable estimates of the disorder’s true prevalence, with 14 % of American children being diagnosed before reaching young adulthood. Notable key opinion leaders continue to claim that there is no cause for concern, but with a message shift from “the prevalence is not too high” to “high prevalence is not too concerning.” This paper provides an object lesson about how innovative research can be derailed to the detriment of sound medical and mental health care of children when industry interests are threatened. Tenure may be the only option for protecting innovative research from specious attacks. The authors offer a summary of the data on ADHD drug treatments, suggest judicious use of such treatments, and add their voices to others who are once again sounding a cautionary alarm.  相似文献   
916.
Proficiency in letter–sound correspondence is important for decoding connected text. This study examined the effects of an evidence-based intervention, incremental rehearsal (IR), on the letter–sound expression of three kindergarten English language learners (ELLs) performing below the district benchmark for letter–sound fluency. Participants were native speakers of Hmong, Spanish, and Polish. A multiple-baseline design across sets of unknown letter sounds was used to evaluate the effects of IR on letter–sound expression. Visual analysis of the data showed an increase in level and trend when IR was introduced in each phase. Percentage of all non-overlapping data (PAND) ranged from 95% to 100%. All participants exceeded expected growth and reached the spring district benchmark for letter–sound fluency. Results suggest that IR is a promising intervention for increasing letter–sound expression for ELLs who evidence delays in acquiring letter sounds.  相似文献   
917.
Callous-unemotional (CU) traits have been associated with problems in behavioral adjustment in past research which has led to proposals to include them in diagnostic classification systems for child behavior problems. In the current study, the factor structure of a comprehensive measure of CU traits was tested in a sample of 540 Italian children in grades 6 and 8. Consistent with past factor analyses in other countries, CU traits could be described as having three subfactors (i.e., callousness, uncaring, unemotional) which load on an overarching general factor. Importantly, this factor structure was invariant across gender and grade. Consistent with past studies, CU traits were positively associated with school behavior problems, bullying, and reactive aggression and this was largely accounted for by the callousness and uncaring subscales. The current results advance past work in showing that these associations extend to cyberbullying and to bullying reported by both self-report and by peer nominations. Further, CU traits were also associated with lower levels of academic achievement, and this was also largely accounted for by the callousness and uncaring dimensions. Finally, although the unemotional subscale did not show consistent associations with problems in behavioral or academic adjustment, it did contribute independently to the prediction (negatively) of peer-reported prosocial behaviors.  相似文献   
918.
This article explores the process of reconstituting Jewish communities and redefining Jewish identity in post-Holocaust Germany through an analysis of the work of Karl Marx and Dr Hendrik G. van Dam, the two principle Jewish communal leaders. It also pays special attention to their role in the larger constellation of West-German politics during the 1960s.  相似文献   
919.
The finding that values, attitudes, and behaviour can be transmitted across generations is long standing. However, the role of fathers in this process has been underinvestigated. Furthermore, many researchers have not tested moderation effects. We extended the literature by investigating maternal and paternal transmission of harsh parenting beliefs to their children 23 years later. Furthermore, we examined the moderating role of interaction quality and included gender and socioeconomic status as control variables. Our data were collected in a unique longitudinal study of 128 families across 23 years. We found high positive associations between the harsh parenting beliefs of parents and their adult children, but only the mother–child transmissions were moderated by interaction quality. Mothers pass on low levels as well as high levels of harsh parenting beliefs to their children if their interaction quality is poor. These findings highlight the importance of investigating intergenerational transmission in both mother–child and father–child dyads.  相似文献   
920.
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