Early visual experience influences haptic cross-sectioning ability

Area of Science:

• Cognitive Neuroscience
• Developmental Psychology
• Sensory Neuroscience

Background:

• Cross-sectioning 3D solids requires advanced spatial reasoning and mental manipulation of 2D and 3D objects.
• The impact of visual impairments on cross-sectioning abilities remains largely unexplored.
• Understanding spatial feature perception is vital, yet its connection to vision deficits is unclear.

Purpose of the Study:

• To investigate how early-life vision influences spatial representation construction and transformation via touch.
• To assess the impact of blindness onset on haptic cross-sectioning performance.

Main Methods:

• Utilized a haptic version of the Santa Barbara Solid Test with 3D-printed solids.
• Compared performance across four groups: early blind, late blind, low vision, and blindfolded sighted participants.
• Analyzed accuracy in identifying cross-sections using a generalized linear mixed model.

Main Results:

• The onset of blindness was the sole significant predictor of cross-sectioning performance (p < 0.001).
• Early blind individuals demonstrated a lower probability of correctly identifying solid cross-sections compared to other groups (p ≤ 0.02).

Conclusions:

• Early visual deprivation negatively affects the development of haptic spatial skills.
• Findings underscore the need for specialized rehabilitation programs for multisensory spatial reasoning in visually impaired individuals.