A baby grasps for his/her rattle at 3 months of age but cannot quite get hold of it. However, by 11 months, the baby is holding and moving the rattle with total control. This is an example of __________
a) principle of hierarchical integration
b) proximodistal principle
c) cephalocaudal principle
d) principle of the independence of systems
Answer: a
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Culture is best defined as:
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