Which of the following represents a disadvantage of experimental research designs?
a. They are more difficult to conduct than observational research.
b. They are often conducted in the field.
c. Some variables cannot be minipulated
d. They use a measured dependent variable.
c
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When the conception of the solar system as earth-centered gave way to the sun-
centered model, this was, in Kuhn's term, a (a) paradigmatic obstacle to scientific progress (b) scientific program change (c) scientific revolution (d) social restructuring
What is the special, often unexpected urgency in treating infants' respiratory illnesses promptly?
A) Respiratory illnesses are easily spread to other members of the family and more difficult to treat in older children. B) Respiratory illnesses may affect the ears, and ear infections may impair hearing and interfere with the development of brain areas that are essential for language development. C) Early respiratory illnesses are likely to result in asthma. D) Infant immunizations cannot be given while a child is ill.