142 research outputs found
An Action-Based Approach to Presence: Foundations and Methods
This chapter presents an action-based approach to presence. It starts by briefly describing the theoretical and empirical foundations of this approach, formalized into three key notions of place/space, action and mediation. In the light of these notions, some common assumptions about presence are then questioned: assuming a neat distinction between virtual and real environments, taking for granted the contours of the mediated environment and considering presence as a purely personal state. Some possible research topics opened up by adopting action as a unit of analysis are illustrated. Finally, a case study on driving as a form of mediated presence is discussed, to provocatively illustrate the flexibility of this approach as a unified framework for presence in digital and physical environment
Source correlation of biomarkers in a mangrove ecosystem on Santa Catarina Island in southern Brazil
Identifying nonspecific ligand binding in electrospray ionization mass spectrometry using the reporter molecule method
Origem e dinâmica da deposição dos sedimentos superficiais na Várzea do Lago Grande de Curuai, Pará, Brasil
Localisations et critères d'orientation chez des enfants de 4 et 5 ans
Summary
The present study investigates, in 4 and 5 year-old children (N = 2 X 64), the relations between homologous and mirror localizations performed in a localization task and the orientation criteria used in a placement task. In both tasks, the child is provided with two identical 7x7 square grids. In the localization task, he has to indicate in the copy grid, which location is the same as a specified location in the model grid. The placement task requires the subject to put an object « in front of, behind, on the left, on the right of » the same grids. The results show that the children who use different orientation criteria for each grid perform more mirror localizations than those who use identical orientation criteria. Furthermore, the metric accuracy of localizations is more clearly related to the children's age than to their orientation criteria.Résumé
Cette recherche étudie, chez des enfants de 4 et 5 ans (N = 2x 64), les relations entre les localisations homologues et en miroir produites dans une tâche de localisation et les critères d'orientation utilisés dans une tâche de placement. Dans les deux tâches, on présente à l'enfant deux matrices carrées (7 x 7 ) identiques. La tâche de localisation consiste à identifier, dans la matrice copie, la même place que celle occupée par un élément dans la matrice modèle. La tâche de placement consiste à poser un objet « devant, derrière, à gauche, à droite » de ces mêmes matrices. Les résultats montrent que les enfants qui adoptent des critères d'orientation différents pour chaque matrice effectuent plus de localisations en miroir que ceux qui adoptent des critères d'orientation identiques. En outre, la précision métrique des localisations observées est plus liée à l'âge des enfants qu'à leur critère d'orientation.Lepecq J.-C. Localisations et critères d'orientation chez des enfants de 4 et 5 ans. In: L'année psychologique. 1981 vol. 81, n°2. pp. 347-367
The reaction of ethidium bromide with oxidising free radicals: Pulse radiolysis in water and DNA
- …