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Using a flashlight-contingent window paradigm to investigate visual search and object memory in virtual reality and
Julia Beitner1, Jason Helbing2, Erwan Joël David2,3
1Department of Psychology, Goethe University Frankfurt, Frankfurt am Main, Germany. juliabeitner@gmail.com.
Scientific Reports
|April 13, 2024
Summary
Searching with a virtual flashlight in 3D scenes, unlike gaze-contingent windows, can improve memory for object identities in virtual reality (VR). Location memory remains unaffected by reduced visual input across VR and screen setups.
Area of Science:
- Cognitive Psychology
- Human-Computer Interaction
- Virtual Reality
Background:
- Gaze-contingent windows modulate visual input but can cause discomfort and visual impairment.
- Naturalistic search methods, like using a virtual flashlight, offer an alternative to explore visual environments.
Purpose of the Study:
- To investigate the impact of a virtual flashlight search on memory for object identities and locations.
- To compare search performance and memory recall between immersive virtual reality (VR) and desktop computer screen environments.
- To evaluate the effectiveness of a flashlight search paradigm in mitigating discomfort associated with traditional visual modulation techniques.
Main Methods:
- Participants searched 3D scenes under flashlight illumination versus standard conditions.
- Memory for object identities and locations was assessed via a surprise incidental memory task.
- Experiments were conducted in both immersive VR and on a desktop computer screen.
Main Results:
- Flashlight search increased task difficulty and memory load.
- A memory benefit for distractor identities was observed in the VR flashlight condition, but not on the computer screen.
- Location memory was comparable across search conditions, irrespective of visual input reduction.
- Subtle VR-specific benefits emerged after controlling for recognition performance.
Conclusions:
- Reduced visual information during search does not necessarily impair spatial memory.
- Virtual reality and desktop screen experiments can yield comparable effects in virtual environments.
- Flashlight search paradigms offer a promising, more naturalistic approach to visual search research, particularly in VR.
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