In recent surveys of psychologists as to their theoretical orientation, researchers found that many respondents reported using a(n) ____________________ approach in which they combined several therapeutic approaches

What is the primary concept in operant conditioning?

A. a conditioned stimulus is neutral B. conditioned response leads to extinction C. behavior is determined by its consequences D. negative reinforcement is the same as punishment

Which of the following are unique characteristics of placental mammals?

a. They have mammary glands. b. They are born in an embryonic state. c. Fetuses are full developed at birth. d. Infants do not need nourishment from their mother after birth.