Over the past few years, pupillometry is proliferation in psychological studies and eye tracking measurement. Pupil size or diameter can reflect mental activities, and affect other's feeling and decision making. In addition, the sizes of our pupils are also influenced by the top-down processing, such as perception and attention, emotion and motivation, mental effort, social cognition and so on. Studies in pupillometry also found that large pupils give others good impressions (e.g. more attractive, more positive), and· cause more positive behav...
