Recent research on the A-not-B error suggests that the reason 10-month-olds fail to recover the hidden toy is because they ______.

A) have immature visual systems
B) have an immature motor system
C) lack logical thinking
D) lack symbolic thinking

A-not-B Error

A cognitive error, often seen in infants, where they mistakenly search for an object in the location where it was last found (location A), even after they have seen it hidden in a new location (location B).

Immature Visual Systems

A developmental phase where the visual apparatus of infants is not yet fully developed, affecting their ability to see clearly and process visual information completely.