Language is based on basic sound units called ______

Recent research on language has modified our earlier understanding of Broca's aphasia such that it is now understood as a problem in

a. language production but not understanding. b. language production but not meaning. c. language form but not meaning. d. language meaning but not form.

Whenever Jean walks by a mirror or any reflective surface, he stops to make sure that his hair looks good and that his clothes look acceptable to his peers. Which principle is at work here?

A) Piaget's theory of centration B) Elkind's theory of the imaginary audience C) Elkind's theory of formal operations D) Piaget's theory of deductive logic