31. If you argued that children all develop according to the same basic, biological schedule, you would be emphasizing the significance of which of the following concepts in guiding development? a. maturation b. assimilation c. accommodation d. equilibration 32. The text discusses a study of Guatemalan infants, who were poorly nourished and not provided with much opportunity for interaction with adults. These infants were also observed to learn to walk at later ages than less-deprived children from other cultures. With respect to the concept of maturation, which of the following conclusions does this study support? a. Maturation is a biologically driven process. b. Maturation depends heavily on brain development. c. Maturation is somewhat dependent on environmental circumstances. d. Maturation has much more to do with culture than with biology. 33. A psychologist notes that brain development depends on having certain experiences, but also that brain development limits the type of experiences a child can have. This comment points out the basic idea behind the term: a. maturation b. interaction c. schema d. accommodation 3 If Andrew is a normal, healthy baby who weighed 8 pounds at birth, about how much would you expect him to weigh at age 4 months: a. 10 pounds b. 13 pounds c. 16 pounds d. 21 pounds 35. In adulthood, a typical person’s head is about one-tenth of the person’s total body length. At birth, the head is about _________ of the newborn’s total body length. a. one-half b. one-third c. one-fourth d. one-sixth 36. All of the following behaviors are likely to be in place by the age of 4 months of age EXCEPT: a. smiling b. the visually guided reach c. the ability to visually focus on an object in the field of vision d. the ability to discriminate between the mother’s face and a stranger’s face 37. Suppose that the average weight of a 12-month-old baby is 23 pounds and 80% of 12-month-old babies weigh between 21 and 25 pounds. If the average weight of a 24-month-old baby is 33 pounds, between what weights should you expect 80% of 24-month-old babies to fall? a. between 32 and 34 pounds b. between 31 and 35 pounds c. between 30 and 36 pounds d. The answer cannot be determined from the information given in this question. 38. When an infant learns to coordinate looking at an object, grasping the object, and putting the object in her mouth, this process is called: a. accommodation b. assimilation c. maturation d. the visually guided reach 39. In the United States, at about what age is the average child first able to sit without support, if placed in this position? a. age 4 months b. age 8 months c. age 10 months d. age 12 months 40. In the United States, about what percent of 1-year-old infants are able to stand by themselves and take their first step? a. about 20% b. about 50% c. about 75% d. nearly 100%