Silent UX? Erfassung der User Experience von intelligenten Heimanwendungen

Vernetzte Geräte dringen immer weiter in unseren Alltag vor. Die mit ihnen propagierte örtliche Entkoppelung des Nutzers vom Produktstandort stellt bestehende Usability- und User-Experience-Methoden vor Probleme. Daher wird hier untersucht, ob psychophysiologische Methoden die Erfassung des Interaktionserlebnisses erlauben. Am Beispiel eines intelligenten Lautsprechers wird getestet, ob das Stresserleben, der kognitive Workload sowie die Emotionen während der Produktinteraktion gleichzeitig mittels psychophysiologischen Maßen erfasst werden können. Diese Studie erweitert bestehende Befunde zum Einsatz von psychophysiologischen Maßen zur Erfassung des Nutzungserlebens und bietet eine gute Grundlage zur Echtzeiterfassung des Nutzererlebens

Identifying Relationships between Physiological Measures and Evaluation Metrics for 3D Interaction Techniques

Abstract. This project aims to present a methodology to study the relationships between physiological measures and evaluation metrics for 3D interaction techniques using methods for multivariate data analysis. Physiological responses, such as heart rate and skin conductance, offer objective data about the user stress during interaction. This could be useful, for instance, to evaluate qualitative aspects of interaction techniques without relying on solely subjective data. Moreover, these data could contribute to improve task performance analysis by measuring different responses to 3D interaction techniques. With this in mind, we propose a methodology that defines a testing protocol, a normalization procedure and statistical techniques, considering the use of physiological measures during the evaluation process. A case study comparison between two 3D interaction techniques (ray-casting and HOMER) shows promising results, pointing to heart rate variability, as measured by the NN50 parameter, as a potential index of task performance. Further studies are needed in order to establish guidelines for evaluation processes based on welldefined associations between human behaviors and human actions realized in 3D user interfaces

Protocolo de avaliação psiconeurofisiológica em crianças entre 9 e 13 anos durante a apresentação de imagens de filmes de animação

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas, Programa de Pós-Graduação em Psicologia, Florianópolis, 2009.A presente pesquisa foca-se no desenvolvimento de um protocolo para a identificação do efeito das características dos personagens do filme de animação infantil Minhocas® sobre o sistema motivacional cerebral de crianças, dentro do conceito sustentado por Lang, Bradley e sua equipe (Bradley, Codispoti, Sabatinelli, & Lang, 2001; Lang, Bradley, & Cuthbert, 1998a, 1998b). A primeira etapa dessa pesquisa delimitou-se à investigação dos efeitos evocados por imagens com dois padrões de olhos (com íris e sem íris - olho preto) e expressão facial neutra. Nesse sentido, foram monitoradas as respostas de condutividade da pele, a freqüência cardíaca e os potenciais corticais lentos de 13 jovens entre 9 e 13 anos. A análise foi realizada aplicando-se os testes de Friedman e Wilcoxon. A partir das respostas fisiológicas dos sujeitos, percebe-se diferenciação no processamento das informações em função dos padrões de olhos. Esse efeito é potencializado pela ordem de apresentação, sendo que a visualização do olho preto pela primeira vez mobilizou mais respostas de ativação simpática e de direcionamento da atenção, verificadas através de maiores respostas de condutividade da pele e menor freqüência cardíaca. Também foram encontradas diferença de gênero. Novas pesquisas são necessárias para refinamento do protocolo e confirmação dos indicadores encontrados

An Empirical Study of Relationships Between Traditional Usability

Task performance data and subjective assessment data are widely used as usability measures in the human-computer interaction (HCI) field. Recently, physiology has also been explored as a metric for evaluating usability. However, it is not clear how physiological measures relate to traditional usability evaluation indexes. In this paper, we investigate the relationships among three kinds of data: task performance, subjective assessment and physiological measures. We found evidence that physiological data correlate with task performance data in a video game: with a decrease of the task performance level, the normalized galvanic skin response (GSR) increases. In addition, physiological data are mirrored in subjective reports assessing stress level. The research provides an initial step toward using physiology as a complementary or an independent usability measure for HCI evaluation

AN EMPIRICAL STUDY OF RELATIONSHIPS BETWEEN TRADITIONAL USABILITY INDEXES AND PHYSIOLOGICAL DATA

Task performance data and subjective assessment data are widely used as usability measures in the human-computer interaction (HCI) field. Recently, physiology has also been explored as a metric for evaluating usability. However, it is not clear how physiological measures relate to traditional usability evaluation indexes. In this paper, we investigate the relationships among three kinds of data: task performance, subjective assessment and physiological measures. We found evidence that physiological data correlate with task performance data in a video game: with a decrease of the task performance level, the normalized galvanic skin response (GSR) increases. In addition, physiological data are mirrored in subjective reports assessing stress level. The research provides an initial step toward using physiology as a complementary or an independent usability measure for HCI evaluation