Portuguese Meeting on Computer Graphics 2014
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Browsing Portuguese Meeting on Computer Graphics 2014 by Author "Gonçalves, Daniel"
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Item Older Adult Performance Using Body Gesture Interaction(The Eurographics Association, 2020) Carreira, Micael; Gonçalves, Daniel; Ting, Karine; Goncalves, Alexandrino and Fernandes, Antonio Ramires and Rodrigues, NunoGesture interfaces are becoming an increasingly popular way to interact with technology, as they are considered very easy to learn and use. However, most gesture interactions studies focus on the average adult or, when focusing on older adults, it is usually in the gaming or physical activity contexts. In this study, we evaluate the suitability of gestural interfaces for older adults, in order to interact with a general technological interface. To this end, we asked 14 older users to perform a set of navigation and selection tasks; two tasks required to interact on most technological interfaces. For each of these tasks, we evaluated two alternative gestures. All senior participants were able to complete almost all the proposed tasks, and enjoyed using this type of interface. We concluded that gestural interfaces are adequate for the senior users, and derived a set of design implications that future developers should take into account when developing gestural interactions for the older people.Item Studying Color Blending for Visualizing Social Artifacts(The Eurographics Association, 2020) Gama, Sandra; Gonçalves, Daniel; Goncalves, Alexandrino and Fernandes, Antonio Ramires and Rodrigues, NunoGiven the tools and applications that are available today, we often communicate at any time and place, generating high volumes of social personal information. Visually representing such data may enable us to navigate and manage it in an effective manner. Color, due to its effectiveness in labeling and categorizing information, may highlight relevant data and further alleviate cognitive load associated with information interpretation. We have studied the use of color blending for representing social artifacts. In this paper we present a user study which we have performed to understand whether humans associate particular colors with different social artifacts. It has allowed us to understand which colors humans associate with contacts and conversation topics regarding either send and received messages, as well as volume and variety. Results have enabled us to derive a set of design implications on how to use color blending to represent social facets when visualizing social personal information.