Looking (for) patterns: Similarities and differences between infant and adult free scene-viewing patterns

Area of Science:

• Cognitive Science
• Developmental Psychology
• Neuroscience

Background:

• Systematic tendencies like center and horizontal bias influence eye movements during scene viewing.
• The origin of these tendencies (learned vs. default) remains unclear.

Purpose of the Study:

• To investigate the origins of systematic eye movement tendencies in infants and adults.
• To compare visual scanning patterns between infants (3-20 months) and adults.

Main Methods:

• Analysis of eye movement data from 157 infants and 88 adults across three scene viewing datasets.
• Comparison of fixation durations, saccade amplitudes, and biases (center, horizontal, leftward).

Main Results:

• Infants exhibited longer fixation durations and shorter saccade amplitudes than adults.
• A leftward bias was observed in adults but not in infants.
• Infants' fixation durations increased with viewing time, mirroring adult patterns.

Conclusions:

• Infant and adult eye movements are largely governed by similar basic processes.
• The absence of a leftward bias in infants suggests it may be a learned strategy or develops later.
• Findings underscore developmental continuity in visual attention mechanisms.