Chp. 12 Verms - Experiments with More Than One Independent Variable
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6 Terms
interaction effect
(also interaction) a result from a factorial design, in which the difference in the levels of one independent variable changes, depending on the level of the other independent variable; a difference in differences
factorial design
a study in which there are two or more independent variables, or factors
cell
a condition in an experiment; in a simple experiment, a cell can represent the level of one independent variable; in a factorial design, a cell represents one of the possible combination of two independent variables
participant variable
a variable such as age, gender, or ethnicity whose levels are selected (i.e. measured), not manipulated
main effect
in a factorial design, the overall effect of one independent variable on the dependent variable, averaging over the levels of the other independent variable
marginal means
in a factorial design, the arithmetic means for each level of an independent variable, averaging over the levels of another independent variable
