Depth Cue Conflicts Between Real and Virtual Objects Disrupt Visually-Guided Reaching in Augmented Reality.

Area of Science:

• Human-Computer Interaction
• Perception Psychology
• Virtual Reality

Background:

• Depth cues like binocular disparity are vital for accurate reaching.
• Augmented reality (AR) can distort perceived depth due to mismatched focal distances.
• Understanding AR's impact on depth perception during active tasks is crucial.

Purpose of the Study:

• To investigate depth perception distortions in AR during a visually guided reaching task.
• To analyze how combinations of real and virtual objects affect reaching accuracy.
• To assess the persistence of depth misperceptions despite multiple depth cues.

Main Methods:

• Participants performed a precision visual motor task in an AR environment.
• They placed a virtual ring around real or virtual posts at varying distances.
• The study combined controlled viewing conditions with naturalistic AR settings.

Main Results:

• Reaching accuracy was significantly degraded when targeting real posts with a virtual ring.
• Fewer successful placements occurred when interacting with real posts compared to virtual ones.
• A systematic underestimation of virtual object distances relative to real objects was observed.

Conclusions:

• Depth perception distortions between real and virtual objects persist during active AR reaching.
• These distortions occur even with multiple depth cues (binocular disparity, proprioception, occlusion, motion parallax).
• Addressing these depth misperceptions is key to improving AR effectiveness and usability.