The tendency of people to help others without regard for their own safety or self-interest is called what?

In research on disease burden, the disability associated with schizophrenia is considered to be comparable to that associated with

a. diabetes. b. hypertension. c. quadriplegia. d. Alzheimer's disease.

According to Piaget, __________ first occurs in Substage 4 of the sensorimotor period

A) intentional, goal-directed behavior B) chance behavior C) repetition of interesting events D) behavior repetition with variation