It appears that breathing and talking are independent, uncoordinated activities. The left cortical hemisphere appears more active during speech than the right hemisphere. Human infants appear particularly attentive when given an opportunity to listen to the sounds of human voices. Language appears to be most easily learned during a sensitive period lasting from birth until around age 12 years. Language acquisition appears to involve attempts to control other people's attention and their behavior.
Parents appear to reinforce children on the basis of factual content rather than grammar.
A systems view. A Skinnerian operant conditioning approach. A nativist view. None of the above. The Fundamental Attribution Error.