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Depth perception: Ability to judge the distance of objects from one another and from one’s self.
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Kinetic Depth Cues (Optical Expansion)
Related to motion Ex: “Defensive” blinking when object moves toward baby Used by 1-month-olds
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Binocular Depth Cues Each eye receives a slightly different view of the visual field Retinal images are combined by the visual cortex to create the perception of depth (stereopsis)
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Develops around 4 months of age
Guides reaching behavior
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Pictorial ( or Monocular) Depth Cues
Used in pictures to create an illusion of 3 dimensions Exs: relative size; interposition
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Used by 7-month-old infants (but not 5-month-olds)
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Fear of Heights Pre-crawling infants and beginning crawlers can perceive depth, but don’t typically show fear of heights More crawling experience is related to fear of heights
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Intermodal Perception: Integration of sensory information from two or more sensory systems
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