Emotional arousal in 2D versus 3D virtual reality environments

Area of Science:

• Cognitive Psychology
• Neuroscience
• Virtual Reality Studies

Background:

• Virtual reality (VR) technology offers immersive experiences through 2D and 3D visual modes.
• Previous research suggests VR elicits emotions, but comparative effects of 2D vs. 3D on emotional arousal and neural underpinnings remain unclear.

Purpose of the Study:

• To investigate the impact of 2D versus 3D visual modes in VR on emotional arousal.
• To explore the underlying neural mechanisms associated with emotional responses in different VR visual modes.

Main Methods:

• A cognitive psychological experiment involving 40 volunteers randomly assigned to two groups.
• Participants viewed positive, neutral, and negative VR videos in both 2D and 3D formats.
• Simultaneous recording of multichannel electroencephalograms (EEG) and skin conductance responses (SCR) during video playback.

Main Results:

• The 3D environment led to more intense emotional stimulation and greater emotional arousal compared to 2D.
• Higher beta (21-30 Hz) EEG power was observed in the 3D condition.
• Evidence suggests both brain hemispheres are involved in stereo vision processing with existing brain lateralization.

Conclusions:

• The enhanced perception of the 3D environment in VR significantly increases emotional arousal.
• Distinct neural activity patterns, particularly in beta EEG power, differentiate emotional responses between 3D and 2D VR.
• Stereo vision processing in VR involves bilateral brain activity and exhibits lateralization.