Eyempact: a low-cost system for integrated eye tracking and physiology analysis

• Autor(a) principal: Martins, Francisco Henriques
• Data de Publicação: 2019
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10773/29664
• topic: Eye tracking; Low-cost system; Visual attention; Physiological monitoring; Psychophysiology assessment

The usual signal to evaluate human attention is eye tracking. Beyond this, bioelectrical signals are also used in this context. The field of research that studies human attention, as well as human behavior and emotions, using these signals is called psychophysiology. Psychophysiological studies usually make use of movies or images to trigger emotions, feelings and behaviors. However, the participants do not always pay the expected attention to the stimulus, which may be justified by the stimulus itself. This avoidance behavior, if not intended at all, can have a negative influence on the psychophysiological and behavioral evaluation a posteriori. Therefore, it is important to understand the effective attention of the participant in the entire experience and have special caution in idealization and designing of said experience. The objective of this work is to provide a set of software tools, the Eyempact system, to evaluate the impact of visual stimuli (static images or movies) on participants, using eye tracking (Tobii eye tracker). Other physiological variables are also monitored (ECG, EDA, EMG using BITalino board). Eyempact is capable of (1) synchronously acquire all this information, and (2) provide a comprehensive offline review environment to support domain specific analysis, namely by psychophysiology features identification. The system was successfully utilized in a case study, the review environment was very useful to visually evaluate specific participant sessions and to export data metrics and measurements for the data analysis presented in this document.