A simple main effect analysis looks at the mean difference at each level of the independent variable.
Given With a simple main effect, the analysis examines.
Simple effects are also called the main effects of design of experiments. The main effect can be defined as the effect of the explanatory variables measured on a particular criterion or response variable of the study. It's easy to say that what happens within the level of the explanatory variables is the difference. In a factorial experiment, the simple main effect is that one independent variable is at a specified level of another. The main effect of one independent variable is averaged across the levels of the other independent variable. For a simple main effect, the results are analyzed as if a separate experiment was performed at each level of the other independent variables.
Therefore, a simple main effect analysis looks at the mean difference at each level of the independent variable.
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