Factorial Designs — Main Effects, Interactions, and Multifactor Experiments Explained | Chapter 11 of Research Methods for the Behavioral Sciences
Factorial Designs — Main Effects, Interactions, and Multifactor Experiments Explained | Chapter 11 of Research Methods for the Behavioral Sciences Chapter 11 of Research Methods for the Behavioral Sciences introduces factorial designs , a powerful approach that allows researchers to study how multiple independent variables—called factors—combine and interact to influence behavior. By examining both main effects and interaction effects , factorial designs provide a more complete understanding of complex relationships in psychology and behavioral science. Watch the complete summary above and subscribe to Last Minute Lecture for more structured textbook breakdowns. What Are Factorial Designs? A factorial design includes two or more factors, each with multiple levels, creating unique combinations of conditions. For example, a 2x2 factorial design has two factors, each with two levels, producing four total conditions. More complex arrangements like 2x3 or higher-order factori...