For girls, breasts begin to enlarge during the 10th year. The breasts typically reach full size in about three years, but the mammary glands do not mature fully until

The process we use to obtain critically important social information about others is known as __________

a) social investigation. b) social validity. c) social perception. d) social identity.

Difficulties in which type of learning signal the development of problems, such as mental retardation?

a) modeling b) habituation c) operant conditioning d) classical conditioning