When compared with mothers, how do fathers interact with their infants, once they are about a
month old and older?
a. Fathers tend to look at the infant's less
b. Fathers take on more of a caregiver role than a playmate role
c. Fathers smile more at infants
d. Fathers are more physical and playful
d. Fathers are more physical and playful
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Librium (chlordiazepoxide) and Valium (diazepam) were the first widely sold
A. benzodiazepines. B. barbiturates. C. methaqualones. D. sedatives.
A company that manufactures drugs to treat heart disease wants to determine if a new drug and exercise can affect cholesterol levels. What are the independent and dependent variables in this proposed study?
a) The dependent variable is exercise; the independent variables are the drug and cholesterol level. b) The dependent variable is cholesterol level; the independent variables are the drug and exercise. c) The independent variables are the drug and cholesterol level; the dependent variable is amount of exercise. d) The dependent variable is the number of heart attacks; the independent variables are the drug, exercise, and cholesterol level.