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Psychology Lecture 32.docx

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Psychology 1000

Psychology Lecture 32, pg 451-458 Issues in Development, Neural Development, Visual Development  What influences development?  How does the brain change in the newborn?  How does the visual system change over the first few months of life?  Emotions begin on left side of face o At peak intensity of expression, its on left side of face  Note o Left frontal lobe more involved in positive emotions, right in negative emotions o More activity in left when watching happy films, more in right for sad/disgusting films o Visible in 10 month old infants What influences development?  Nature -> Maturation vs. Nurture -> Learning  Its an interaction  Nature determines the range of abilities  Nurture chooses the alternatives Stagelike development  Discontinous stages separated by rapid growth  Qualitative difference  Ex. A caterpillar becoming a butterfly in stages Continous development  Smooth, continual change  Quantitative difference  Ex. A fish growing. Performs all functions at all ages, just older does it better Normative vs. Individual Theories  Normative o Typical sequence of change o Look for consistency o Methodology is cross-sectional  Individual o Consistency not there o Look at individual o Methodology is longitudinal Brain Development  100-200 B neurons at birth  Neurons not produced after second trimester  Increase in weight (350-1400 g) due to glial cells and myelination  Number of synapses increase rapidly from birth to adult  Cortical development mirrors emergence of abilities o Frontal lobe develops fast Taste and Smell  Very much like adult o Suck faster for sweet liquid o Reject salty liquid o Pleasant expression for bananas o Frown for rotten eggs Hearing  Responds to wide variety of sounds
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