The reality of virtual reality.

Area of Science:

• Cognitive Neuroscience
• Human-Computer Interaction
• Psychophysiology

Background:

• Virtual reality (VR) is increasingly used to study human behavior and brain function.
• The nature of VR (reality vs. simulation) is debated, often assessed via subjective presence.
• Subjective measures of presence may be biased and lack comparison to real-life experiences.

Purpose of the Study:

• To compare psychophysiological responses to real-life versus virtual reality (VR) height exposures.
• To determine if VR can authentically replicate real-world experiences for scientific investigation.
• To assess cognitive and emotional processing similarities between real and VR environments.

Main Methods:

• Participants experienced height exposure on a fire truck in real-life, VR (3D-360° video), or a 2D lab setting.
• Electroencephalography (EEG) and heart rate variability (HRV) were used to measure psychophysiological responses.
• Behavioral data, alpha/theta oscillations (vigilance/anxiety), and beta oscillations (sensory processing) were analyzed.

Main Results:

• Real-life and VR height exposures were psychophysiologically indistinguishable (EEG, HRV), differing from the 2D lab setting.
• Cognitive, emotional, and vigilance mechanisms were similarly engaged in real-life and VR conditions.
• Sensory processing (beta oscillations) differed across all conditions, indicating room for haptic VR improvement.

Conclusions:

• Photorealistic VR technology can effectively mimic reality, enabling controlled studies of real-world processes.
• VR offers a viable alternative to real-life experiences for investigating cognitive and emotional mechanisms.
• Further advancements in VR haptics are needed to fully replicate sensory experiences.