Does the Voice-Based Lifelogging Method “Laughter Map” of Visualizing a User’s Laughter Experiences Enhance Positive Mood?

An increasing number of people are experiencing mental stress in their daily lives. In particular, in the field of psychology, past events are easily recalled in relation to the current mood. In this study, we aim to clarify whether supporting the recall of previous pleasant experiences can enhance a positive mood. In our previous study, we proposed a voice-based lifelogging application “Laughter Map” to enable logging and checking of previous laughter scenes in a map format. The proposed visualization method for pleasant memories can help in recalling the memories. In this study, we conducted an experiment to verify the effect of presenting past laughter experiences by laughter map on moods. In the experiment, we compared the laughter map with a random map that provides the previous conversation cut out randomly. This paper reports on the change of mood obtained with positive and negative affect scale and temporary mood scale scales, along with the questionnaire results in the experiment. Experimental results suggests that the laughter map increased positive moods, such as liveliness, compared to the random map.