Are you ashamed? Can a gaze tracker tell?

The user interfaces of the future cannot be imagined without an emotion-sensitive modality. More ways other than plain speech are used for communication. Spatial, temporal, visual and vocal cues are often forgotten in computer interfaces. Each cue relates to one or more forms of nonverbal communication that can be divided into chronemics, haptics, kinesics, oculesics, olfactics, paralanguage and proxemics (Tubbs, 2009), relating to certain activities of a human body, voice or gazing. Unfortunately, modern computer-based user interfaces do not take full advantage of nonverbal communicative abilities, often resulting in a much less than natural interaction.