Most teenagers in the U.S. do not get enough vitamins and minerals in their diets.
Indicate whether the statement is true or false
Question 2
According to B.F. Skinner, when parents require that children's utterances of words be progressively closer to actual words before they are reinforced, this is called:
a. grammatical construction. c. shaping.
b. expressive vocabulary. d. negative reinforcement.
