Limits of object persistence:young infants perceive continuity of vertical and horizontal trajectories, but not 45-degree oblique trajectories

Bremner, James Gavin and Slater, Alan Michael and Mason, Ursula Charlotte and Spring, Joanne and Johnson, Scott (2017) Limits of object persistence:young infants perceive continuity of vertical and horizontal trajectories, but not 45-degree oblique trajectories. Infancy, 22 (3). pp. 303-322. ISSN 1525-0008

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Abstract

Previous research indicated that 4-month-old infants perceive continuity of objects moving on horizontal trajectories but appear to have difficulty processing occlusion events involving oblique trajectories. However, because perception of continuity of vertical trajectories has not been tested, it is uncertain whether this indicates a specific deficit for oblique trajectories or a specific advantage for horizontal trajectories. We evaluated the contribution of trajectory orientation and the form of occlusion in three experiments with 144 4-month-olds. Infants perceived continuity of horizontal and vertical trajectories under all conditions presented. However, they did not perceive continuity of an oblique (45˚) trajectory under any condition. Thus 4-month-olds appear unable to process continuity of a 45˚ trajectory. In a fourth experiment with 48 6- and 8-month-old infants, we demonstrated that by 6 months infants' difficulty with oblique trajectories is overcome. We suggest that young infants’ difficulty with oblique trajectories likely relates to immature eye movement control.

Item Type:
Journal Article
Journal or Publication Title:
Infancy
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3200/3204
Subjects:
ID Code:
81892
Deposited By:
Deposited On:
07 Oct 2016 09:30
Refereed?:
Yes
Published?:
Published
Last Modified:
25 Oct 2020 04:22