Cue-dependent effects of VR experience on motion-in-depth sensitivity

Area of Science:

• Visual neuroscience
• Perception science
• Human-computer interaction

Background:

• The visual system uses monocular and binocular cues for 3D motion perception.
• Laboratory studies often show weak sensitivity to binocular cues for motion-in-depth (MID).
• This weakness may stem from prior 2D display experience, where binocular cues are uninformative.

Purpose of the Study:

• To investigate the impact of virtual reality (VR) experience on motion-in-depth (MID) sensitivity.
• To assess how initial VR exposure affects reliance on different visual cues for depth perception.
• To compare MID sensitivity in a VR environment versus traditional laboratory settings.

Main Methods:

• Tested a large cohort of observers with no prior VR experience in a VR environment.
• Evaluated sensitivity to monocular and binocular cues, both in isolation and combination.
• Assessed changes in cue sensitivity with increasing experience within the VR task.

Main Results:

• Initially, binocular cue sensitivity for MID was significantly weaker than monocular cue sensitivity in VR.
• Observers initially relied heavily on monocular cues, even discounting binocular cues when motion parallax was present.
• Sensitivity to both monocular and binocular cues substantially increased with VR experience.
• Most observers improved from chance-level performance to statistically significant sensitivity for binocular MID cues after gaining experience.

Conclusions:

• In-the-wild VR experience enhances motion-in-depth perception, particularly for binocular cues.
• Initial underestimation of binocular cue sensitivity in laboratory settings is likely due to lack of relevant experience.
• VR environments may provide a more ecologically valid assessment of visual depth perception capabilities.