A DGS gesture dictionary for modelling on mobile devices     

Seiji Isotani  Helena M. Reis  Danilo Alvares  Anarosa A. F. Brandão  Leônidas O. Brandão 《Interactive Learning Environments》2018,26(3):320-336

Interactive or Dynamic Geometry System (DGS) is a tool that help to teach and learn geometry using a computer-based interactive environment. Traditionally, the interaction with DGS is based on keyboard and mouse events where the functionalities are accessed using a menu of icons. Nevertheless, recent findings suggest that such a traditional model of interaction has a steep learning curve and is inadequate to develop DGS for devices with multi-touch screens. Thus, we propose a new interaction model for DGS based on a gesture dictionary which enables the construction and manipulation of geometric objects without the need of accessing a menu of icons. The dictionary is divided into three types: (i) kernel gestures: which are the basis for defining gestures; (ii) navigation gestures: related to the manipulation and editing of geometric objects; and (iii) basic gestures of construction: to construct geometric objects. To validate our interaction model, a DGS for mobile device, GeoTouch, has been developed using the proposed dictionary. Usability tests were performed comparing GeoTouch with three other DGS for mobile devices. The results indicate that the GeoTouch interface has fewer usability problems than the other three DGS software and it is easier to learn and interact with.  相似文献   

Current Tobacco-Smoking and Neural Responses to Infant Cues in Mothers     

Helena J. V. Rutherford  Angela N. Maupin  Nicole Landi  Marc N. Potenza  Linda C. Mayes 《Parenting, science and practice》2017,17(1):1-10

Objective. Smoking has a detrimental impact on maternal physical health and exposes children to secondhand smoke, but the extent to which it affects maternal brain and behavior is not well-known and may have implications for parent and child development. We examined how current smoking status might relate to maternal neural responses to infant cues using event-related potentials. Design. Current smoking (n = 35) and non-smoking (n = 35) mothers viewed photographs of emotional infant faces while electroencephalography was simultaneously recorded. Results. The latency of the face-specific N170 event-related potential component was delayed in smoking mothers compared to non-smoking mothers, and the P300 was differentiated by smoking status. Conclusions. Postpartum smoking is associated with event-related potential measures that may reflect modulation of infant face perception in motherhood.  相似文献   

Contrasting predictive and causal values of predictors and of causes     

Pineño O  Denniston JC  Beckers T  Matute H  Miller RR 《Learning & behavior》2005,33(2):184-196

Three experiments examined human processing of stimuli as predictors and causes. In Experiments 1A and 1B, two serial events that both preceded a third were assessed as predictors and as causes of the third event. Instructions successfully provided scenarios in which one of the serial (target) stimuli was viewed as a strong predictor but as a weak cause of the third event. In Experiment 2, participants’ preexperimental knowledge was drawn upon in such a way that two simultaneous antecedent events were processed as predictors or causes, which strongly influenced the occurrence of overshadowing between the antecedent events. Although a tendency toward overshadowing was found between predictors, reliable overshadowing was observed only between causes, and then only when the test question was causal. Together with other evidence in the human learning literature, the present results suggest that predictive and causal learning obey similar laws, but there is a greater susceptibility to cue competition in causal than predictive attribution.  相似文献   

Power,Freedom and Resistance: Excavating the Design Jury     

Helena Webster 《The International Journal of Art & Design Education》2006,25(3):286-296

There can be little argument that the design jury features as a key symbolic event in the education of the architect. However, whilst the centrality of the design jury as a site for learning disciplinary skills, beliefs and values is now widely acknowledged, there continues to be considerable disagreement about what is learnt and how. While critical pedagogues argue that the design jury is a critic‐centred event that coerces students into conforming to hegemonic notions of habitus, those who promote reflective practice see it as a student‐centred event in which a critical dialogue with experts supports students' construction and reconstruction of their own habitus. This article, inspired by Michel Foucault's writings on the analytics of power, reports on the findings of a yearlong ethnographic study carried out in one British school of architecture that sought to excavate ‘what really goes on’ in the design jury.  相似文献   

Finnish adult students’ perspectives on short-cycle study programmes: motives and evaluations     

Helena Aittola  Jani Ursin 《高等教育研究与发展》2019,38(2):205-218

ABSTRACT

We investigated how students in Finland perceive short-cycle higher education programmes. In line with the European trend, Finland has piloted short-cycle study programmes in order to attract adult students into higher education. We found that the students were mainly satisfied with their studies, and that their orientations to studies and learning were extrinsic in nature. The strengths of the programme were perceived as related to the flexibility of the studies, the variety of teaching methods, and the extensive contents of the studies. The main challenges were associated with difficulties in using information and communications technology (ICT) within the studies, and issues with time management. The study sheds light on how more open higher education structures and study processes can promote participation in higher education among adult students.  相似文献   

Mathematical performance predicts progress in reading comprehension among 7-year olds     

Marja-Kristiina Lerkkanen  Helena Rasku-Puttonen  Kaisa Aunola  Jari-Erik Nurmi 《European Journal of Psychology of Education - EJPE》2005,20(2):121-137

The aim of this longitudinal study was to investigate cross-lagged relationships between mathematical performance and reading comprehension during the first and second years of primary school. 114 Finnish-speaking children were examined six times on mathematics and reading comprehension during Years 1 and 2. At the beginning of Year 1, they were also tested on initial mathematics and reading skill, general concept ability and visual-motor skills. The results showed, firstly, that mathematics and reading comprehension were highly associated with each other across both years. Secondly, mathematical performance predicted subsequent reading comprehension during the first year rather than vice versa. The results suggest that it is important to pay more attention to the role of mathematical knowledge when children are entering to school.  相似文献   

The use of Web 2.0 tools by students in learning and leisure contexts: a study in a Portuguese institution of higher education     

Carolina Costa  Helena Alvelos  Leonor Teixeira 《Technology, Pedagogy and Education》2016,25(3):377-394

  相似文献   

Motivated Attention and Reward in Parenting     

Anne E. Ferrey  Nicholas Santascoy  Eamon J. McCrory  Chloe Thompson-Booth  Linda C. Mayes  Helena J.V. Rutherford 《Parenting, science and practice》2016,16(4):284-301

Parenting has a significant and lasting impact on child development. From birth, parents must sensitively and appropriately attend to their infant’s emotional expressions and vocalizations. Accumulating evidence indicates that these infant cues of emotion attract more attention than equivalent adult cues in parents as well as non-parents. We review this evidence and suggest that infant cues hold high incentive value and elicit motivated attention (i.e., enhanced processing of motivationally relevant stimuli), which in turn promotes approach motivation and thus caregiving responses. Further, we discuss data suggesting that infant cues are salient for non-parents, with increasing motivated attention to infant cues in the transition to parenthood. This increase may depend on interactions between the dopamine reward system and the neuropeptide oxytocin. Therefore, we also explore the human and non-human data that support this association and consider potential sources of variability in motivated attention in parents.  相似文献   

Causal and predictive-value judgments,but not predictions,are based on cue-outcome contingency     

Vadillo MA  Miller RR  Matute H 《Learning & behavior》2005,33(2):172-183

In three experiments, we show that people respond differently when they make predictions as opposed to when they are asked to estimate the causal or the predictive value of cues: Their response to each of those three questions is based on different sets of information. More specifically, we show that prediction judgments depend on the probability of the outcome given the cue, whereas causal and predictivevalue judgments depend on thecue-outcome contingency. Although these results might seem problematic for most associative models in their present form, they can be explained by explicitly assuming the existence of postacquisition processes that modulate participants’ responses in a flexible way.  相似文献   

Role of the Undergraduate Student Research Assistant in the New Millennium   总被引：1，自引：0，他引：1  

Thais Dutra Nascimento Silva  Lúcia Cristina da Cunha Aguiar  Jaqueline Leta  Dilvani Oliveira Santos  Fernanda Serpa Cardoso  Lúcio Mendes Cabral  Carlos Rangel Rodrigues    Helena Carla Castro 《CBE life sciences education》2004,3(4):235-240

In this study, we analyze the contribution of the undergraduate student who participates in the process of generating scientific data and developing a research project using Brazilian research as an example. Historically, undergraduate students have performed the critical role of research assistants in developing countries. This aspect has been underappreciated as a means of generating scientific data in Brazilian research facilities. Brazilian educational institutions are facing major age-related generational changes among the science faculty within the next 5–10 yr. A lack of adequate support for graduate students leads to a concern that undergraduates will not be interested in choosing research assistant programs and, subsequently, academic research careers. To remedy this situation it is important to focus on ways to encourage new research careers and enhance university–industry collaborations.  相似文献