Journal
EXPERIMENTAL BRAIN RESEARCH
Volume 163, Issue 2, Pages 204-213Publisher
SPRINGER
DOI: 10.1007/s00221-004-2162-0
Keywords
2-D tracking; gaze; saccades; oculomotor; infant
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We investigated 6- to 12-month-old infants' ability to track an object moving on circular trajectories, using a longitudinal design. Consistent predictive gaze tracking was not found before 8 months of age. These results indicate that infants' horizontal and vertical components of circular tracking are less mature than expected from previous studies of one-dimensional horizontal tracking. Vertical components are especially immature, particularly during high velocity tracking (similar to 20 degrees/s). The results also suggest that horizontal and vertical tracking are mutually dependent during early development. Saccades were predictive (average lag >-125 ms) from 6 months onwards.
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