________ and ________ are the hallmarks of the experimental method, which set it apart from the observational and correlational methods
a. Random assignment; probability levels
b. Representative sampling; control over extraneous variables
c. Control over extraneous variables; random assignment
d. Correlation coefficients; dependent variables
Answer: C
Psychology
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Fetal alcohol syndrome refers to:
a) development of physical malformations b) development of mental retardation c) damaging effects on the unborn child as a result of the mother's alcohol consumption d) All of the above.
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Ordinarily, when the mean wealth of a country increases, so does average satisfaction with life. Which country has been an exception to that rule in recent decades?
a. Mexico b. China c. Japan d. United States
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