The Effects of Restricted Peripheral Field-of-View on Spatial Learning while Navigating

Area of Science:

• Neuroscience
• Cognitive Psychology
• Vision Science

Background:

• Simulated visual acuity and contrast sensitivity reductions impair spatial learning and increase attentional demands during navigation.
• Peripheral field loss is linked to reduced mobility and spatial memory deficits in room-sized environments.

Purpose of the Study:

• Investigate the role of peripheral vision in large-scale spatial navigation.
• Quantify spatial memory errors across varying degrees of field-of-view (FOV) restriction.
• Assess the attentional resources required for navigation under different FOV restrictions.

Main Methods:

• Normally sighted participants navigated real-world paths with goggles simulating severe (0-15°) and mild (60°) FOV restriction.
• Spatial memory was assessed via pointing to remembered target locations.
• Cognitive load was measured using a concurrent auditory reaction time task.

Main Results:

• Severe FOV restrictions (4° and 0°) significantly impaired spatial memory pointing accuracy.
• Increased reaction times on the secondary attention task were observed at 10° and 4° FOV restrictions, indicating higher cognitive load.
• Attentional demands increased with peripheral field loss starting at 10°, but spatial memory deficits were only evident at 4°.

Conclusions:

• Navigating with significant peripheral vision loss demands greater attentional resources.
• Substantial spatial memory impairment during navigation is associated with very severe field-of-view restriction (around 4°).
• Findings inform understanding of spatial learning mechanisms and aid in developing navigation aids for visually impaired individuals.