Superintendent Hastings has asked all teachers in her school district to administer student intelligence tests. If performances at each age level formed a normal distribution, the results were probably __________-shaped

In a survey of American pediatricians, what percentage recommended that infants sleep in a crib in a room of their own?

a. 22% b. 44% c. 88% d. 99%

Today there is a growing recognition of the fact that

A) cognitive factors determine the course of both psychological and biological disorders. B) behavioral and biological factors interact to determine health. C) all psychological disorders have a clearly defined biological basis. D) it is unlikely we will ever be able to determine the causes of psychological disorders.