A 3-month-old infant who sucks her thumb, discovers that it is pleasurable, and sucks it again is demonstrating Piaget's concept of ______ circular reactions

Stress, poor diet, and discrimination collectively place children growing up in ___________at greater risk for developing health problems

A) single parent households B) poverty C) rural areas D) boarding schools

According to the ________ perspective, one purpose of behavior is to reduce the tension that has been brought about by powerful inner forces such as conflicts between personal needs and society's demands

a. cultural b. humanistic c. behavioristic d. psychodynamic