Perceptional Development

Perceptional Development - Perceptional Development (Feb....

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Unformatted text preview: Perceptional Development (Feb. 21- test 2) Sensation and perception A. Sensation- the registering of the physical energy of the world on to the sense organs Ex. Have to wear glasses if bad sensation B. Perception- the organization and interpretation of sensed energy into meaningful form How do we study perception? A. Preference Method- two objects are presented simultaneously and we record how long infant attends to each one. B. Habituation Method- a stimulus becomes so familiar or boring that infant stops showing any response to it.---one at a time C. Evoked Potentials- present with a stimulus and record brain waves. Visual Perception- most dev. Happens. Has done the most research A. Early theorists (James) speculated that infants perceive the world as blooming and buzzing confusion. B. Recent research suggests that infants perceive a wide variety of sights very early. C. 3 types of visual perception: Pattern Perception, Perception of Faces and Facial Expression, Depth perception Pattern Perception A. Infants aged 2 months and older can discriminate patterns similar to adults- even highly complex ones B. Infants from 0-2 months, however, can only discriminate moderately complex patterns C. These infants can see and prefer: High contrast/ moderately complex patterns; Curvilinear rather than linear patterns Perception of Faces A. Newborn infants track face-like patterns. B. By 2-4 months: babies prefer normal drawings of faces to scrambled ones; Babies fixate on internal parts of faces instead of just the edges of faces. Perception of Facial expressions A. 3-4 month old infants: Can discriminate between happy and sad faces; prefer happy faces to sad ones; show happiness to happy faces and distress to angry faces B. 6-12 months Social Referencing occurs: infants can read others facial expressions and use them to guide their behavior. Can Babies See the Edges of Cliffs- Depth Perception? A. Eleanor Gibson invented the visual cliff to study this. B. Put baby in middle of cliff. Put mother on deep side or shallow side. Have mother call baby. Visual Cliffs. What Happens? A. Gibsons findings: found that infants could avoid deep side shortly after they started crawling; concluded that babies could see and understand depth without learning. Only those who crawl. B. Later research questions this: Pre-locomotive infants show decrease in heart rate on the deep side of visual cliff; this suggests interest, not fear!...
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This note was uploaded on 03/29/2008 for the course PSYCH 230 taught by Professor Phillips during the Spring '08 term at Iowa State.

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Perceptional Development - Perceptional Development (Feb....

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