PSYC 2030 Chapter Notes - Chapter 8: Environmental Factor, Analysis Of Variance, Factorial Experiment
31 Mar 2013
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Chapter 8: experimental design ii - factorial designs. In factorial studies/designs, two kinds of results occur main effects and interactions. Main effects refer to the overall influence of the independent variables, and interactions examine whether the variables combine to form a more complex result. The way to find out if there is a main effect of type of training is to compare all of the. There are no main effects because the row and column means are the same: 75. However, something still happened in the study the science students did better i the lab course but the humanities students did better in the lecture course. Or to put it in terms of the definition of an interaction, the effect of one variable (course type) depended on the level of the other variable (major). Hence, even if no main effects occur, an interaction can still occur and produce an interesting outcome.
