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20 Cards in this Set
- Front
- Back
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what did scientists presume first about infants abilities?
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that they were hardwired.
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early work on perceptual development:
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was focused on the innate abilities of infants.
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later work on perceptual development showed:
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the environment in where the infant is raised plays a major role in proper development
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perceptual development now depends on:
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genetic factors, environment, and proper nervous system development
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preferential looking technique
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1. infants like to look at new things, especially patterns.
2. they look either at the right or left side. 3. a viewer is on the other side but doesnt know which plate the infant is looking at so this gives a more honest and accurate answer. |
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according to the preferential looking technique how old must the infant be
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must at least be 5-7 months onld in order to fixate
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in very young infants, what can be measured?
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sucking behavior
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what is the difference between retina of an infant and retina of an adult?
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infants have big, fat and few photoreceptors; while adults have skinny and many photoreceptors.
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what does infants photoreceptors affect?
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their acuity is low because of all the big empty spaces between each photoreceptor, since they are so big.
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acuity
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ability to see detail
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newborn cones have:
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fat inner segments, and very small outer segments
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adult cones have:
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inner and outer segments are larger and about the same diameter
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the fovea of an infant has:
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highest density of cells
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what happens to the cells in the development of the fovea for an infant?
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many more cells develop clearly as baby gets older
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what is contrast sensitivity measured by?
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determing the smallest difference between the dark and light bars of a grating at which an infant can still detect the bars
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spatial frequency
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a measure of how fine the bar patter is on the retina
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can babies see color?
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yes
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at what age does true vision come to an infant
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at age 3
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what is well developed in a 6 month old baby
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color vision
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habituation
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is the result of a stimulus being presented over and over again, and the infant looks less and less at the pattern and will then look at something new
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