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Research in Science Education - Studies have investigated various aspects of the use of questions in science lessons, but there is still a lack of research that demonstrates how, during peer... 相似文献
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Mauro Rojas Herrera Edleno Silva de Moura Marco Cristo Thomaz Philippe Silva Altigran Soares da Silva 《Information processing & management》2010
Queries submitted to search engines can be classified according to the user goals into three distinct categories: navigational, informational, and transactional. Such classification may be useful, for instance, as additional information for advertisement selection algorithms and for search engine ranking functions, among other possible applications. This paper presents a study about the impact of using several features extracted from the document collection and query logs on the task of automatically identifying the users’ goals behind their queries. We propose the use of new features not previously reported in literature and study their impact on the quality of the query classification task. Further, we study the impact of each feature on different web collections, showing that the choice of the best set of features may change according to the target collection. 相似文献
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Susana Rojas Teresa Susinos Adelina Calvo 《International Journal of Inclusive Education》2013,17(2):156-173
This article seeks to illustrate how a research study that claims to be inclusive should incorporate into its development, decisions of methodological flexibility that enable voice to be given to all participants regardless of their personal conditions. The changes carried out in the techniques, procedures or in the kind of questions used in the research, illustrate how young persons can be involved in the building of scientific and academic knowledge that is being generated about them. This work forms part of a more extensive line of inquiry that started a number of years ago by two Spanish universities (Cantabria and Seville). 相似文献
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Mariangeles de la Caba Collado Isabel Bartau Rojas 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2010,26(4):377-398
The aim of this article is to outline and assess an educational intervention programme targeted at improving the skills of
families and the personal and social development of children living in situations of grave social vulnerability. The sample
comprised 10 families during the first phase of the intervention and six during the second. The design, intervention and assessment
process of this study was carried out in two phases over a period of a year and a half. For both phases, three different groups—of
men/fathers, women/mothers and children—were established. Study variables (parenting skills and children’s personal and social
development) were evaluated before and after the intervention in every group, as well as during the entire process. The results,
taking into account the improvements reported by all the participants (social workers, group monitors, fathers, mothers, children)
show that inter-professional involvement and coordination at all phases of the intervention is vital in order to achieve small
but significant improvements. 相似文献
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Sylvia Rojas‐Drummond Nancy Mazón Karen Littleton Maricela Vélez 《Journal of Research in Reading》2014,37(2):138-158
The present study explores the development and promotion of reading comprehension in primary school students, in the context of the implementation of an educational programme called ‘Learning Together’ (LT). The programme, which centred on collaborative learning activities, was designed to promote oral and written communication in primary school Mexican children. Analyses revealed that children who participated in the LT programme, in comparison with students in a control condition, produced higher‐quality written summaries of texts they had read, both when working in teams and when working individually. This suggests that the LT participants appropriated and transferred the text comprehension strategies promoted, so that they could apply these strategies effectively not only in collaborative contexts but also independently, that is, in a self‐regulated and autonomous fashion. The theoretical and practical implications of the work are discussed in relation to understanding and promoting oracy and literacy processes in primary school students. 相似文献
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Carmen Gutiérrez-Cruz F. Javier Rojas Marcos Gutiérrez-Davila 《Journal of sports sciences》2016,34(7):651-657
The aim of this study was to analyse the effect of stimulus change timing on reaction response time parameters, horizontal velocity of the centre of mass (CM) and precision during offensive actions in fencing. Twelve fencers from the Spanish National Foil Team were included in the study. Two 500 Hz force plates were used to register the horizontal component of the reaction force while a 3D video camera set at 250 Hz recorded the spatial position of 11 body markers and a projector connected to a programmed stopwatch projected a moving target (stimulus) on a screen. When the circle (target) appeared in the centre of the plastron, fencers had to execute a step-forward-lunge as fast as possible, trying to touch the circle with the tip of the foil. During the lunge, the position of the target could randomly shift or not to three different positions. The stimulus change was performed randomly at four different times with a progressive delay. The results show that target changes did not have any effect when they occurred at the beginning of the movement sequence. However, when the target change was delayed, reaction and movement times increased and the technical execution of the lunge changed, leading to more errors. 相似文献
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Objective
The aim of the study was to examine caregiver management strategies for child sexual abuse (CSA) when presented with hypothetical scenarios that vary in physical invasiveness.Methods
One hundred fifty three caregivers were given 3 scenarios of CSA with 7 management strategies presented in the 21-item Taking Action Strategies (TAS) scale. Caregivers were asked to rate strategies according to their willingness to carry out each action with rating of 5 = greater likelihood of carrying out the action specified while a rating of 1 = a lower likelihood of carrying out that action. CSA scenarios included exposure to pornography/masturbation, fondling, and penetration while management strategies including fighting the accused, blaming the child, and outreaching to the authorities. Repeated measures ANOVA was used to compare mean TAS scores for the management strategies across CSA scenarios.Results
The difference between TAS scores across the abuse scenarios was statistically significant (p < .001). Mean TAS scores reflected greater preference for taking action if the abusive act was perceived as more physically intrusive (exposure to pornography/masturbation-TAS 3.5, fondling-TAS 3.7, penetration-TAS 3.8). Caregivers reported being less willing to handle a disclosure of CSA without outreach (TAS 2.5 and 2.0 for fighting and blaming the child, respectively) and more willing to manage a disclosure with outreach to authorities (TAS 3.8, 4.5, and 4.7 for outreaching to Child Protective Services [CPS], to the child's healthcare provider and police, respectively). A predictor of caregiver outreach to authorities identified was the caregiver having past interactions with CPS.Conclusion
Perception of the physical invasiveness of CSA and demographic factors can impact caregiver management strategies after a disclosure.Practice implications
Results suggest that several factors influence caregiver management of sexual abuse. These factors warrant further study, as they are potential contributors to declining trends in CSA cases observed. Other implications include the need for educational efforts targeting caregivers. These interventions should focus on dispelling myths about the perceived physical invasiveness of CSA. These perceptions should not mitigate a caregiver's decision to involve the authorities in their management after a disclosure. Lastly, despite criticisms of the child protective systems, caregivers with past encounters with CPS view these related agencies as valuable resources. 相似文献8.
Jennifer Brundidge R. Kelly Garrett Hernando Rojas Homero Gil de Zúñiga 《Mass Communication and Society》2014,17(4):464-486
Observations of the contemporary news media environment often revolve around the topics of ideological polarization and blurred boundaries between mass and interpersonal communication. This study explores these topics through a focus on the association between ideologically oriented online news use, commenting on online news, and political participation. We hypothesize that both ideological online news use generally and proattitudinal online news use are positively related to political participation and that online news commenting creates “differential gains” by augmenting these relationships. Yet we also hypothesize that counterattitudinal online news use is negatively related to political participation and that online news commenting creates “differential losses” by exacerbating this relationship. Analyses of two independently collected and nationally representative surveys found that frequent ideological online news use, proattitudinal online news use, and commenting are all positively related to political participation. We found no evidence for differential gains as a result of online commenting but only for differential losses—counterattitudinal online news use interacts with commenting to create a negative relationship with political participation. 相似文献
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Gutierrez-Davila M Rojas FJ Ortega M Campos J Parraga J 《Journal of sports sciences》2011,29(12):1321-1328
This study seeks to discover whether handball goalkeepers employ a general anticipatory strategy when facing long distance throws and the effect of uncertainty on these strategies. Seven goalkeepers and four throwers took part. We used a force platform to analyse the goalkeeper's movements on the basis of reaction forces and two video cameras synchronised at 500 Hz to film the throw using 3D video techniques. The goalkeepers initiated their movement towards the side of the throw 193 ± 67 ms before the release of the ball and when the uncertainty was reduced the time increased to 349 ± 71 ms. The kinematics analysis of their centre of mass indicated that there was an anticipatory strategy of movement with certain modifications when there was greater uncertainty. All the average scores referring to velocity and lateral movement of the goalkeeper's centre of mass are significantly greater than those recorded for the experimental situation with bigger uncertainty. The methodology used has enabled us to tackle the study of anticipation from an analysis of the movement used by goalkeepers to save the ball. 相似文献
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