Delores repeatedly showed Curtis, her two-month-old, a picture of his grandfather. She noticed that Curtis seemed to become less interested in looking at the picture each time she showed it to him. Then she showed Curtis a picture of his grandmother, and he looked at it as long as he had first looked at his grandfather's picture. Curtis's loss of interest in his grandfather's picture demonstrates

Today, most American pediatricians believe that it is best to be patient with toddlers and their progress toward toilet training. When do they recommend toilet training now?

a. when the toddler is 20 months old b. when the toddler seems ready c. anytime before kindergarten d. when the cost of diapers gets too expensive

The process of shifting the infant's diet from breast- or bottle-feeding to eating and drinking a wider variety of foods is referred to as:

a. solidifying b. marasmus c. de-breasting d. weaning