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DP_lecture_earlyexperiences

DP_lecture_earlyexperiences - The Effects of Early...

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The Effects of Early Experience
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The Valence of Plasticity Negative: neglect Kitten’s eyes Raise in a vertical world Could not see horizontal lines Positive: Violinists’ left hand
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Enriched Environments Greenough’s rats: Enriched environments & control rats learning on future tasks synapse formation dendritic spines (surface area) neural growth Is it possible to get better than normal (experience-expectant development)?
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Gene-Driven Experience-Expectant (Synapse overproduction) Experience-Dependent Language Development One particular Language (L/R) Caregiver 3 Types of Development (Synapse Formation)
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Critical and Sensitive Periods Critical Period = time in the early stages of an organism's life during which it displays a heightened sensitivity to certain environmental stimuli, and develops in particular ways due to experiences at this time. If the organism does not receive the appropriate stimulus during this "critical period", it may be difficult, or even impossible, to develop some functions later in life.
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Critical Period Example Binocular Vision --> Ocular Dominance Columns in Visual Cortex
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