Six-year-old Mikael has 10 dinosaur toys on the floor in front of him. You ask him how many he has, and he counts them one at a time. This is an example of which of the following?

When a therapist uses a treatment method that encourages children to use puppets, finger paints, clay, blocks, and other toys to express their feelings, they are following the example of

A) Anna Freud. B) Klein. C) Mahler. D) Erikson.

Sensitive periods refer to the

a. patterns of physical development from conception to death. b. developmental sequence of one's temperament. c. years of aging characterized by marked physiological and psychological deterioration. d. times when individuals are most susceptible to certain environmental influences.