PSYC207 Study Guide - Final Guide: Internal Validity, Confounding, Random Effects Model
3 Mar 2016
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Experiment the researchers manipulated at least one variable and measured another. Manipulated variable a variable that is controlled, such as when the researchers assign participants to a particular level (value) of the variable; independent variable: the independent variables levels are called conditions. Measured variable take the form of records of behavior or attitudes, such as self reports, behavioral observations, or physiological measures; dependent variable. Control variable any variable that an experimenter holds constant on purpose; helps eliminate potential third variables so they are helpful with internal validity. Experiments support causal claims through covariance, temporal precedence, and internal validity. Comparison group comparison condition; do not get this benefit from personal experience. If the independent variables did not vary, a study could not establish covariance. You need to be able to answer, compared to what? . Placebo group exposed to inert treatment like a sugar pill.
