Poster Session A, Saturday, March 23, 1:30 pm - 3:30 pm, Pacific Concourse
A technique for evaluating interest in dynamic stimuli using eye-fixation related brain potential.
Kohei Fuseda1, Jun'ichi Katayama1; 1Department of Psychological Science, Kwansei Gakuin University
Interest is considered an emotion related to the attentional activity. The event-related brain potential (ERP) probe technique that measures the allocation attentional resource is an effective method to measure the level of interest in the dynamic stimuli such as videos. In this technique, the level of interest was indirectly evaluated by ERPs to probes, which could interrupt the ongoing task, even though it was task-irrelevant. Eye-fixation related brain potential (EFRP) is an ERP and is time-locked to the end of saccadic eye movement. To investigate whether EFRP can be used as a measure of the level of interest without probe stimuli, we measured the EFRP while participants watched the videos. Twelve men were presented with two video clips for each high and low attractive woman in random order. The electroencephalogram and electrooculography (EOG) signals were recorded while they were viewing the videos and the EFRP was extracted based on EOG signals. The lambda wave amplitude corresponding to P1 in visual ERP that reflects attentional processing was larger when a high attractive woman was observed. The amplitude of the late positive wave revealed the same pattern, whereas there was no observable difference between both videos in EOG activities. The results of the lambda wave and the late positive wave indicate a top-down modulation of attention and the modulation of the motivational attention by the attractiveness of the video, respectively. Therefore, EFRP is effective and can be used without probe stimuli to evaluate the level of interest in a dynamic stimulus.
Topic Area: ATTENTION: Other