Sensory_Outline(2) - Sensory and Perceptual Development How...

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Sensory and Perceptual Development How do we know what baby knows? Preference Technique – look at different things and show preference Habituation Technique – babies get tired of something and look away Scanning (recording cornea and reflection) Observe in Natural setting Changes in Physiology Operant Conditioning Vision Visual Acuity (how well do babies see?) -don’t have good vision when born, get better by 6 months How do we know that? if a checkerboard pattern is made gradually finer and finer, we eventually perceive a flat gray infant presented with a patterned stimulus (e.g. vertical black and white lines) and a uniform one (e.g. plain grey) will tend to look more at the patterned one By varying the distance between black & white stripes & having the infant compare this with the gray field you can assess the infants’ acuity. Because visual acuity is so poor, infants need to focus on objects that are close (7-8 inches away) Do infants see color? -Yes Visual Preferences -prefer stimuli with moderate intensity -prefer patterns (bulls eye to plain card, faces to others) -prefer mother’s face
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  • Spring '08
  • AlysonShapiro
  • Sensory and Perceptual Development, Physiology ­Operant Conditioning, ·Very young infants, Natural setting ­Changes

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