1. Orientation effects in the development of linear object tracking in early infancy
- Author
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Tham, Diana, Rees, Alison, Bremner, Gavin, Slater, Alan, Johnson, Scott, Tham, Diana, Rees, Alison, Bremner, Gavin, Slater, Alan, and Johnson, Scott
- Abstract
Infants' oculomotor tracking develops rapidly but is poorer when there are horizontal and vertical movement components. Additionally, persistence of objects moving through occlusion emerges at 4 months but initially is absent for objects moving obliquely. In two experiments we recorded eye movements of 32 4-month-old and 32 6-month-old infants (mainly Caucasian-White) tracking horizontal, vertical, and oblique trajectories. Infants tracked oblique trajectories less accurately, but six-month-olds tracked more accurately, such that they tracked oblique trajectories as accurately as 4-month-olds tracked horizontal and vertical trajectories. Similar results emerged when the object was temporarily occluded. Thus, 4-month-olds’ tracking of oblique trajectories may be insufficient to support object persistence, whereas 6-month-olds may track sufficiently accurately to perceive object persistence for all trajectory orientations.
- Published
- 2021