Perceptual Development of Three-Dimensional Object Completion in 4-to-10 Month Old Infants
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Authors
Gaughan, Alissa
Issue Date
2006
Type
Thesis
Language
en_US
Keywords
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Abstract
The development of the visual system begins at a much younger age than believed by
Piaget. At 4-mon infants' perceive object unity of a partly occluded object if provided
with texture, alignment, narrow occlusion, and motion. As fine manipulatory skills
develop around 5-to-6 mons, infants gain more knowledge of object properties. The
proposed present studies examine 4-to-1 0-mon-old infants' ability to complete
volumetrically a computer generated stimulus. After habituation to a 15° rotation, infants
are tested with a 360° rotation of a complete and incomplete stimulus. Researchers
hypothesized that 6-to-1 0-mon old infants would volumetrically complete the stimulus
and therefore show a longer looking time to the incomplete stimulus due to their growth
in manipulatory skills. The control condition was used to verify that it was the
habituation trials that lead to infants volumetrically completing the stimulus. Researchers
found significant effects for both the test and the test x age interaction in the wedge and L
(the stimulus used for the following experiments) experiment. As predicted, no
significant effects were found in the control condition. For the wedge condition,
researchers found a significant difference in averaged looking times between the 4-
month-old group and the 911 0-month-old group when viewing the complete wedge. For
the L condition, researchers found a significant difference in average looking times
between the 4-month-old group and the 9/1 0-month-old group when viewing the
incomplete wedge. This study is one of the first to be conducted looking at infant's ability
to volumetrically complete an object from a limited vantage point and at what age that
develops.
Description
61 p.
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