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pdp2 - PartII (Fantz,1961 Infantvision theylookat 1 Black...

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3/1/10 1 Perceptual Development Part II Assessing vision in infants Preferen6al‐looking technique (Fantz,1961) Infant vision Infants typically show preferences in what they look at. Prefer complex paGerns to simple s6muli.
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3/1/10 2 Black Red Preference for Faces Externality Effect Preference for Faces Externality Effect Preferences for preGy faces (at 2 months) the “average” of faces is the preMest (as rated by adults)
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3/1/10 3 Visual Acuity Children and adults Measured by Snellen eye chart Infants Measured by gra6ng acuity Snellen Eye Charts Grating Acuity
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3/1/10 4 Newborn Acuity Newborn 20/200 to 20/400 Cornea isn’t shaped right (matures around 6 to 18 months) More cones need to develop (re6na is underdeveloped) Ciliary muscles need to strengthen
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3/1/10 5 Visual improvements Accommoda6on Lens and cornea become beGer able to focus light on the re6na Acuity Increased number of cones Increased number of neural connec6ons in the visual cortex.
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