Fiona is 6 months old, and her grandfather just bought her a new toy that squeaks when
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Question:
Fiona is 6 months old, and her grandfather just bought her a new toy that squeaks when she presses it. She loves the new sound that she has discovered and she makes the toy squeak over and over again. Fiona's behaviour is characteristic of which stage of cognitive development?
a. coordination of secondary schemes
b. primary circular reaction
c. secondary circular reaction
d. tertiary schemes
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