Augusta is making silly faces at her 3-month-old baby, Umberto. All of a sudden, she stops making faces and assumes a neutral expression. Umberto is unhappy with this and tries to make her change her face. Umberto seems to understand
A) reciprocity.
B) effectance.
C) trust.
D) adaptation.
Question 2
Little Derek has learned to take turns when playing peek-a-boo with his father. This shows that he has learned about
A) reciprocity.
B) effectance.
C) trust.
D) adaptation.
