Quantifying epistemic actions in human-computer interaction

As digital systems move away from traditional desktop setups, new interaction paradigms are emerging that better integrate with users’ realworld surroundings, and better support users’ individual needs. While promising, these modern interaction paradigms also present new challenges, such as a lack of paradigm-specific tools to systematically evaluate and fully understand their use. This dissertation tackles this issue by framing empirical studies of three novel digital systems in embodied cognition – an exciting new perspective in cognitive science where the body and its interactions with the physical world take a central role in human cognition. This is achieved by first, focusing the design of all these systems on a contemporary interaction paradigm that emphasizes physical interaction on tangible interaction, a contemporary interaction paradigm; and second, by comprehensively studying user performance in these systems through a set of novel performance metrics grounded on epistemic actions, a relatively well established and studied construct in the literature on embodied cognition. The first system presented in this dissertation is an augmented Four-in-a-row board game. Three different versions of the game were developed, based on three different interaction paradigms (tangible, touch and mouse), and a repeated measures study involving 36 participants measured the occurrence of three simple epistemic actions across these three interfaces. The results highlight the relevance of epistemic actions in such a task and suggest that the different interaction paradigms afford instantiation of these actions in different ways. Additionally, the tangible version of the system supports the most rapid execution of these actions, providing novel quantitative insights into the real benefits of tangible systems. The second system presented in this dissertation is a tangible tabletop scheduling application. Two studies with single and paired users provide several insights into the impact of epistemic actions on the user experience when these are performed outside of a system’s sensing boundaries. These insights are clustered by the form, size and location of ideal interface areas for such offline epistemic actions to occur, as well as how can physical tokens be designed to better support them. Finally, and based on the results obtained to this point, the last study presented in this dissertation directly addresses the lack of empirical tools to formally evaluate tangible interaction. It presents a video-coding framework grounded on a systematic literature review of 78 papers, and evaluates its value as metric through a 60 participant study performed across three different research laboratories. The results highlight the usefulness and power of epistemic actions as a performance metric for tangible systems. In sum, through the use of such novel metrics in each of the three studies presented, this dissertation provides a better understanding of the real impact and benefits of designing and developing systems that feature tangible interaction.

Efeito da massagem terapêutica na saúde mental das pessoas com patologia oncológica

CONTEXTO: O enfermeiro deve interagir com as pessoas em situação de saúde ou doença, melhorando o seu contexto sociocultural e o seu processo transição. Estas interações são organizadas com um propósito em que o enfermeiro utiliza ações terapêuticas para promover a saúde. A massagem terapêutica consiste em pressionar e esfregar o corpo ou partes deste com fins terapêuticos. OBJETIVO(S): Avaliar o efeito da intervenção da massagem terapêutica na saúde mental das pessoas com patologia oncológica. METODOLOGIA: Revisão sistemática da literatura, através dos descritores “pacientes”, “oncologia” e “massagem”, estudos de 2000 a 2012, em bases de dados e motores de busca online. RESULTADOS: O corpus do estudo foi composto por 15 artigos e demonstra que a massagem terapêutica reduz, quer de imediato, quer a longo prazo, a ansiedade e a depressão. Contudo, há estudos em que não existiram diferenças nestas variáveis. Esta intervenção melhora, de imediato, o relaxamento, o bem-estar emocional e o padrão de sono, a dor, o desconforto físico-emocional e a fadiga. Não houveram diferenças estatísticas significativas que corroborassem a melhoria da qualidade de vida, stress e sofrimento. CONCLUSÕES: A massagem terapêutica tem efeitos benéficos a curto prazo na saúde mental das pessoas com patologia oncológica. No entanto, relativamente à ansiedade e depressão os resultados analisados são contraditórios, reportando-se para investigações futuras. Sugerimos novas pesquisas para maior consistência empírica sobre os efeitos da intervenção da massagem terapêutica na saúde mental das pessoas com patologia oncológica e assim contribuir para a prática de uma enfermagem de excelência baseada na evidência.