Psychology 2800E Chapter 11: ch. 11 true experiments, part 2 factorial designs (white)

• School: Western University
• Department: Psychology
• Course: Psychology 2800E
• Professor: Patrick Brown

Document Summary

11: true experiments, part 2: factorial designs (white) 7:12 pm as long as you are designing an experiment, building another iv into the design may not require much extra effort. More variables = rule out more than one alternative hypotheses. Building more variables in means you can rule out interactions among variables factorial design: research design that involves all combinations of at least two values of two or more independent variables. 2x2 factorial design: two variables, each of which has two values. With increasing complexity you will require much more time to conduct the experiment. Most experiments use 2 or 3 factors with 2-6 levels on the various factors. Main effect: in a factorial experiment, the effect of one iv averaged over all levels of another iv. Main effect does not mean the principal effect of a variable find the main effect of facial expression by averaging effect of facial expression over the 2 levels of attractiveness.