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   5648篇
  免费   293篇
  国内免费   4篇
  2023年   65篇
  2022年   90篇
  2021年   117篇
  2020年   158篇
  2019年   153篇
  2018年   285篇
  2017年   273篇
  2016年   242篇
  2015年   155篇
  2014年   178篇
  2013年   739篇
  2012年   430篇
  2011年   446篇
  2010年   263篇
  2009年   177篇
  2008年   350篇
  2007年   281篇
  2006年   247篇
  2005年   217篇
  2004年   126篇
  2003年   136篇
  2002年   133篇
  2001年   64篇
  2000年   80篇
  1999年   44篇
  1998年   27篇
  1997年   19篇
  1996年   22篇
  1995年   20篇
  1994年   12篇
  1993年   16篇
  1992年   30篇
  1991年   20篇
  1990年   25篇
  1989年   24篇
  1988年   26篇
  1987年   16篇
  1985年   12篇
  1984年   16篇
  1983年   12篇
  1979年   15篇
  1978年   11篇
  1976年   13篇
  1974年   10篇
  1971年   10篇
  1970年   10篇
  1969年   9篇
  1968年   11篇
  1966年   9篇
  1965年   10篇
排序方式: 共有5945条查询结果,搜索用时 62 毫秒
921.
Studies have demonstrated that maternal stress and perceptions of self-efficacy influence a mother's performance, affecting her ability to interact with her child and to understand and answer his needs. The purpose of this study was to evaluate maternal stress and the perception of self-efficacy in the mothers of infants who are cared for in child-care centers and belong to the poorest segment of the Chilean population. To this end, these aspects were studied in 121 low-income, high-social-risk mothers with children between the ages of 4 and 9 months. The final goal was to generate an explicative model of self-efficacy and maternal stress that considered characteristics of the family and the child. The results revealed that family characteristics - especially household size, per capita incomes and mother age - are more relevant for explaining maternal self-efficacy and stress. The findings and implications for practice are discussed.  相似文献   
922.
Using data from the International Social Survey Programme, this research investigated asymmetric attitudes of ethnic minorities and majorities towards their country and explored the impact of human development, ethnic diversity, and social inequality as country‐level moderators of national attitudes. In line with the general hypothesis of ethnic asymmetry, we found that ethnic, linguistic, and religious majorities were more identified with the nation and more strongly endorsed nationalist ideology than minorities (H1, 33 countries). Multilevel analyses revealed that this pattern of asymmetry was moderated by country‐level characteristics: the difference between minorities and majorities was greatest in ethnically diverse countries and in egalitarian, low inequality contexts. We also observed a larger positive correlation between ethnic subgroup identification and both national identification and nationalism for majorities than for minorities (H2, 20 countries). A stronger overall relationship between ethnic and national identification was observed in countries with a low level of human development. The greatest minority‐majority differences in the relationship between ethnic identification and national attitudes were found in egalitarian countries with a strong welfare state tradition.  相似文献   
923.
The cost of attending to a visual event can be the failure to consciously detect other events. This processing limitation is well illustrated by the attentional blink paradigm, in which searching for and attending to a target presented in a rapid serial visual presentation stream of distractors can impair one's ability to detect a second target presented soon thereafter. The attentional blink critically depends on 'top-down' attentional settings, for it does not occur if participants are asked to ignore the first target. Here we show that 'bottom-up' attention can also lead to a profound but ephemeral deficit in conscious perception: Presentation of a novel, unexpected, and task-irrelevant stimulus virtually abolishes conscious detection of a target presented within half a second after the 'Surprise' stimulus, but only for its earliest occurrences (generally 1 to 2 presentations). This powerful but short-lived deficit contrasts with a milder but more enduring form of attentional capture that accompanies singleton presentations in rapid serial visual presentations. We conclude that the capture of stimulus-driven attention alone can limit explicit perception.  相似文献   
924.
Predicting the consequences of actions is fundamental for skilled motor behavior. We investigated whether motor prediction is influenced by the fact that some movements are easier to perform and stabilize than others. Twelve subjects performed a bimanual rhythmical task either symmetrically or asymmetrically (the latter being more difficult and less stable) while oscillating in each hand an object attached to an elastic cord. Motor prediction was monitored through the adequacy of anticipatory grip force adjustments with respect to the elastic resisting force. Results showed less adequate predictive control during asymmetrical movements (compared with symmetrical ones). Furthermore, switching between modes of coordination induced even larger alterations. An interesting finding was that grip force control did not always stabilize around the expected value after voluntary transition. We conclude that motor prediction is affected by the degree of coordination between the upper limbs and by phase transitions and is prone to carryover effects.  相似文献   
925.
The purpose of this study was to examine the effectiveness of second tier intervention at-risk readers within the context of a Response to Intervention approach. The study was conducted in the Canary Islands (Spain), directed by research team ¨Dificultades de Aprendizaje, Psicolingüística y Nuevas Tecnologías¨ (DEA&NT) from University of La Laguna, and supported by the Government of the Canary Islands. A sample of 1.123 Spanish children from fourteen schools districts were given the Spanish adaptation of The Hong Kong Specific Learning Difficulties Behavior Checklist and children who scored at or above the 75th percentile on the test were classified as "at risk" for early reading difficulties. Half of the students were randomly assigned to a project-based intervention condition where they received small group supplementary intervention for 30 minutes daily using the Prevención de las Dificultades Específicas de Aprendizaje (PREDEA) curriculum from mid to late December and continued until mid June. The other half received whatever remedial services were available at their schools. Results indicated that children who received the PREDEA curriculum had higher scores on the Early Grade Reading Assessment Test (EGRA) on initial sound identification, listening comprehension, letter sound knowledge and oral reading fluency compared to the control group.  相似文献   
926.
The aim of this work was to examine the psychometric properties of the Spanish version of the "Recovery Experience Questionnaire" developed by Sonnentag and Fritz. The sample was made up of 941 professionals from the security sector. Results from the exploratory factor analysis suggested the possibility of considering a four-factor structure. Confirmatory factor analysis showed that the four-factor model with three correlated items each provided the best fit to the data (CFI=0.97, GFI=0.96, NNFI=0.96, RMSEA=0.05 y AIC=171.76). Therefore, the questionnaire maintains the four recovery experiences -psychological detachment from work, relaxation, mastery experiences and control over leisure time--but with 12 items instead of 16 items as in the original scale. Reliability analysis showed good internal consistency for this scale with Cronbach alpha coefficients for the factors ranging from .75 to .88. Significant correlations were found between the recovery experiences and various external variables, providing evidence of construct validity. Thus, this Spanish version shows adequate psychometric properties and may help to achieve a better understanding of this topic.  相似文献   
927.
In-group favouritism has become a variable of enormous importance in the study of inter-ethnic relations. According to current approaches, it can be understood as a tendency among the members of one group to favour or value the behaviour, attitudes, preferences or perceptions of their own group over those of another group to which they do not belong. The aim of this work is to study the psychometric properties of a new test for measuring inter-ethnic in-group bias, in majority (native) and minority (immigrant) groups. The test is based on the acculturation areas of the Relative Acculturation Extended Model (RAEM). Participants were 992 Spaniards and 975 immigrants (500 Romanians and 475 Ecuadorians). The reliability estimate and validity evidence for these samples show that the psychometric properties of the In-group Bias Test are appropriate for use in multi-ethnic contexts, as it can be used in majority (native) and minority (Romanian and Ecuadorian immigrants) groups.  相似文献   
928.
Psychometric properties of an instrument for assessing cyber-sex addiction. Cyber-sex addiction is a ?new pathology? whose prevalence has grown rapidly in recent years. Therefore, it is important to have validated assessment instruments. The aim of this study was the adaptation and validation of the Internet Sex Screening Test (ISST) for its use in a Spanish population. The instrument was administered to 1239 Spanish college students. The results yielded five components that account for 47.5% of the variance. Internal consistency was .88 and temporal stability was .84. Moreover, the instrument had adequate convergent and discriminant validity and was related to other behaviors such as the use of pornography, internet addiction, number of hours online and sexual frequency. Therefore, this tool is proposed as an appropriate measure to assess cyber-sex addiction.  相似文献   
929.
Several subjects with Specific Language Impairment (SLI) show communicative and pragmatic problems. In this study, we suggested that mentalistic comprehension tasks would help us to find a deteriorated pragmatic profile among the population with SLI. To achieve this goal, a group of participants with conventional SLI (n=11) was compared to a group of SLI with more pragmatic problems (n=9) and their respective control group with typically developed language (n=13), of ages between 4 and 7 years. Results revealed that all the groups were able to attribute mental states in tasks where the context was structured. However, the subjects with predominant pragmatic SLI showed poorer performance than those with conventional SLI when tasks were communicative-oriented and they needed to process non-explicit information from the context. These findings suggest that it is possible to isolate a SLI subtype with more pragmatic problems and also that we can use mentalistic tasks to assess these difficulties more accurately.  相似文献   
930.
Switch cost does not disappear as more preparation time for the next task is allowed. Tornay and Milán showed that the residual cost is smaller when tasks switch randomly than when they alternate in predictable sequences. They proposed that the difference was due to control mechanisms (anterior attentional network) being activated in the random condition because of its overall difficulty. Besides, it has been shown that increasing arousal levels inhibits the anterior attentional network. Therefore, Tornay and Milán's account predicts that high arousal should result in switch cost for the random condition increasing to the levels of predictable switching. In this work, this prediction was tested by assessing the interaction between increased arousal and switch cost with both predictable and random-task switching. The results may help to solve the ongoing controversy about the causes of switch cost.  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