Evaluating gaze behaviors as pre-touch reactions for virtual agents.

Area of Science:

• Human-computer interaction
• Virtual reality
• Nonverbal communication

Background:

• Nonverbal cues significantly impact agent perception and interaction.
• Few studies address pre-touch reactions and gaze behavior's influence on perception.
• This study investigates pre-touch reactions in humanoid avatars within virtual reality.

Purpose of the Study:

• Investigate factors defining pre-touch reactions in humanoid avatars.
• Analyze how pre-touch reactions influence participant perceptions.
• Evaluate the impact of gaze behavior on human-likeness, naturalness, and likeability.

Main Methods:

• Two experiments conducted to assess approach conditions (inside/outside field of view).
• Four gaze behaviors implemented: face-looking, hand-looking, face-then-hand, hand-then-face.
• Participant preferences evaluated based on perceived human-likeness, naturalness, and likeability.

Main Results:

• Two-step gaze behavior perceived as more human and natural, regardless of approach location.
• Face-first gaze behavior preferred over hand-first for single-step movements within the field of view.
• Complex gaze movements, including face-looking, are crucial for improving perceptions in pre-touch situations.

Conclusions:

• Gaze behavior enhances avatar responsiveness and immersion in virtual reality.
• Gaze behavior provides an additional communication channel in virtual reality interactions.
• Incorporating gaze behavior extends haptic interaction and complements existing nonverbal cues.