21. Suppose you examine an ultrasound image of a fetus, who is sucking her right thumb. Generalizing from research presented in the text, what is the probability that this fetus will be right-handed at age 15? a. about 50% b. about 67% c. about 85 % d. about 100% 22. Suppose you examine an ultrasound image of a fetus, who is sucking her left thumb. Generalizing from research presented in the text, what is the probability that this fetus will be left-handed at age 15? a. about 50% b. about 67% c. about 85 % d. about 100% 23. Research suggests that a person’s preference for right- versus left-handedness develops at about what age? a. prenatally b. at about 1 year of age c. at about 2 ½ years of age d. at about 4 years of age, as the child is learning to draw 24. For people who are right-handed, language functions are generally found in _____ hemisphere(s) of the brain; for people who are left-handed, language functions are generally found in _____ hemisphere(s) of the brain. a. the right; the left b. the left; the right c. both; the left d. the left; both 25. If Joshua is left-handed, your best guess would be that his language abilities are localized in which part of his brain? a. the left hemisphere b. the right hemisphere c. both the left and right hemisphere d. in neither the left nor the right hemisphere 26 If Mary Ann is right-handed, your best guess would be that her language abilities are localized in which part of her brain? a. the left hemisphere b. the right hemisphere c. both the left and right hemisphere d. in neither the left nor the right hemisphere 27. Handedness is especially interesting to developmentalists because it is intimately linked to: a. physical size at maturity b. homosexuality c. language lateralization d. intelligence as measured on an IQ test 28. Suppose that you can place a child with developmental disabilities into one of four programs. Which of these would you choose because it would likely produce the best outcome for the child? a. a program that begins in infancy and focuses broadly, addressing both cognitive and health-related needs b. a program that begins at age 4 and focuses broadly, addressing both cognitive and health-related needs c. a program that begins in infancy and focuses narrowly and directly on cognitive development d. a program that begins at age 4 and focuses narrowly and directly on cognitive development 29. Dr. Lansing emphasizes that just as the environment influences the child’s development, the child also acts on the environment, changing it. The concept that best describes this two-way interchange is: a. lateralization b. egocentrism c. interaction d. pragmatics 30. Which of the following is the best example of a gross motor skill? a. writing b. handling a fork and spoon c. drawing d. running