POL SCI 3 Chapter Notes - Chapter 3: Internal Validity, Experiment, Demand Characteristics
26 Sep 2016
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Essence of the true experiment is control: experimenter creates the conditions and randomly assigns individuals to those conditions. Thus can be confident that any resulting differences between individuals assigned to varying conditions must be caused by differences in the conditions themselves. By creating treatment and conditional conditions, the experimenter can isolate one causal variable at a time. Experiments advertised as studies of citizens" reactions to tv new programs, Examine whether priming is enhanced when tv new both pays attention to a problem and implies that the president is responsible for the problem: crossing the 2 factors of exposure and responsibility results in four experimental treatments. In sum, sequential experiment subjects viewed edited newscasts over a week; assemblage experiment subjects viewed a single collection of news stories assemblage less realistic but enables the pursuance of more subtle propositions. By placing advertisements in newspapers and posts.
