operant conditioning is inefficient because it relies on imitation

children acquire a good deal of their verbal behavior by imitating adults

children do not rely on imitation in the acquisition of verbal behavior

the acquisition of verbal behavior depends on operant conditioning

both parents and children imitate one another, but parental imitations are more accurate

children frequently imitate grammatical rules incorrectly and therefore require correction

children use imitation to improve the accuracy in reproducing grammatical rules

both parents and children imitate each other frequently

motherese

infant-directed speech

child-directed speech

caregiver speech

At birth, children know the elementary aspects of the language of their parents.

By age one, children typically use about three words consisting of single morphemes.

Babies learn a language best when they are forced to repeat phrases given to them by their parents.

none of the above

Piaget

Skinner

Vygotsky

Chomsky