The search for an empirical science of politics has been closely associated with a movement known as _________________, the belief that scientific method can be fruitfully applied to the social sciences.

What is illustrated by the continued prevalence of negative advertising in American elections?

A)The ease of producing negative ads overshadows the potential costs. B)The costs of running negative ads are of no concern to candidates. C)The messages of negative advertising are routinely disregarded by voters. D)The anticipated benefits outweigh any apprehensions about using them.

A poll in which a limited number of people are selected in such a way that each person in the population has an equal chance of being chosen is which of the following? ?

a. Representative sample  b. Straw poll  c. Focus group  d. Random sample