By what age do infants perceive 3D space and possess depth perception?
6 months
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What helps aid depth perception and which 2 processes provide depth information?
Motor skills, Accommodation and Convergence which develop approx 2-3 months.
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What did Gibson and Walk do?
Visual Cliff Experiment, infants of crawling age reluctant to cross deep side but happy on shallow side. Depth perception = innate? However 6 months old, experience?
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What did they find?
Depth perception = innate.
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Campos et al?
Measured heart rates of infants younger than original VCE, found 2 months old showed a decrease in heart rate suggesting interest rather than fear?
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Schwartz?
Measured heart rate of 5-9 months. 5 months = decrease in heart rate. 9 months = increase in heart rate.
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What is depth perception associated with?
ability to MOVE.
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How is it achieved?
By analysis of environmental cues, binocular vision is therefore particularly useful
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Why is motor control important?
Helps communication and provides mother-child satisfaction when successful.
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What are the 3 reflexes?
Rooting, Moro, Grasping. Rooting - turning head when touched, feeding. Moro - throwing arms and legs out then pulling them back with fingers curled Grasp - grasping objects placed in hand.
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What are gross and fine motor skills?
Gross - movement of large muscles Fine - movement of small muscles
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What are the C and P principles?
CEPHALOCAUDAL - physical maturation and growth from head to toe. PROXIMODISTAL - physical maturation and growth from center of body to extremities.
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2 types of grasp?
Ulner and Pincer.
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How does reaching improve?
As depth perception advances and as infants gain greater control of body posture and arm and hand movements.
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Other cards in this set
Card 2
Front
What helps aid depth perception and which 2 processes provide depth information?
Back
Motor skills, Accommodation and Convergence which develop approx 2-3 months.
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