3-10-CognitiveDevelopment1

3-10-CognitiveDevelopment1 - Cognitive Development...

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1 Cognitive Development Cognitive Development Physical Growth & Innate Capacities • Piaget’s Stage Theory of Cognitive Development • Beyond Piaget • Language Development Physical Growth Body Size – Human growth rate less than most animals – Growth tends to come in spurts – Requires dependency on parents – On average, girls develop faster than boys Height gains for boys and girls from birth to 19 yrs • Human growth rate is much slower than other mammals
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2 Physical Growth Brain Size – In most mammals, the newborn’s brain is nearly adult size – Human brain starts out at 23% of adult size – Growth of human brain also in spurts – What contributes to brain growth spurts • Increasing dendritic growth b formation of more synapses • Increasing myelinization • Human growth rate is much slower than other mammals newborn 3-months 15-months Innate Response Capacities • Infants possess a number of vital reflexes Rooting reflex – when cheek touched, infant turns head and opens mouth Sucking reflex – rhythmic sucking when stimulation 3-4 cm inside mouth Innate Response Capacities • Infants possess a number of vital reflexes Grasp reflex – when object touches palm, infant closes fist tightly around object Orienting reflex – infants pay more attention to novel stimuli than those to which they have habituated
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3 Innate Response Capacities • Infants lack gross and fine motor control to support own movements beyond kicking and flailing • Control develops over time 1. Reaching (16-20 weeks) 2. Whole hand grasp (20-24 weeks) 3. Differential use of thumb and fingers (24-36 weeks) 4. Pincher grasps (after 36 weeks) • Infants are very near- sighted and cannot see things very clearly • Distinguish between light and dark contrasts (e.g., hair line) • Discriminate color • Can track slowly moving stimulus Innate Perceptual Abilities Audition Infants can discriminate between a variety of sounds Innate Perceptual Abilities Taste Infants are very sensitive to tastes
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4 Cognitive Development • Physical Growth & Innate Capacities Piaget’s Stage Theory of Cognitive Development
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This note was uploaded on 05/23/2011 for the course PSYCHOLOGY 1101 taught by Professor Parks,nate during the Spring '08 term at Georgia Tech.

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3-10-CognitiveDevelopment1 - Cognitive Development...

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