PSYCH291 Study Guide - Midterm Guide: Convergent Validity, Analysis Of Variance, Selection Bias
20 Feb 2015
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Matching (before r. a)--matching each participant in an experimental condition with a very similar participant in a control condition, researchers hoped to guarantee that their experimental and control groups would be equal R. a (for internal validity: two groups of people can be virtually identical as groups, even though each group is made up of completely different people o. Is used in experiments to help equate different experimental conditions before manipulations. Random selection (for external validity: used in population surveys to help you increase the likelihood that the small sample in your study generalizes to a larger population of interest. Jane (a black woman) and markco (a lation man). Suggests that people"s attitudes towards blacks are better than to whites or latinos: nope jane is also the only woman. Artifacts--refer to variables that are held constant, do not threaten internal validity but do threaten external o. If all your participants have the same background.
