In an experiment on the effects of massed versus distributed practice on learning, introductory psychology students who volunteered for extra credit were randomly assigned to one of two groups Both groups were to practice a perceptual-motor task five times for 10 minutes each. Group 1 did all five 10-minute practice sessions in one evening while group 2 was asked to do one 10-minute practice session a night for five consecutive nights. All of the participants in Group 1 completed the experiment, but only 30% of the participants in Group 2 showed up for all five nights. This study is an example of confounding by
a. differential attrition.
b. selection bias.
c. history.
d. demand characteristics.
A
Political Science
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Dictators are accountable to elected lawmakers.
Answer the following statement true (T) or false (F)
Political Science
Which of the following statements does not reflect the relationship between channels of mass communication and the public?
a. News organizations serve as vital sources of information and opinions for the public. b. News organizations serve the interests of government officials, thus hindering their ability to convey unbiased information to the public. c. Citizens are able to voice their viewpoints through mass communications channels. d. Citizens provide feedback to the commercial news media by purchasing goods featured in advertisements.
Political Science