PSYCO212 Lecture Notes - Lecture 29: Dependent And Independent Variables, Statistical Hypothesis Testing
Document Summary
Interaction: in a factorial design, a situation that occurs when the effect of one independent variable differs depending on the level of the other independent variable. Factorial design: a study in which there are two or more independent variables or factors. Crossed factorial design: researchers cross two or more independent variables and study each possible interaction. Nested factorial design: more than one independent variable, in which levels of one independent variable are nested under and unique to the levels of another higher-order independent variable. Participant variable: a variable such as age, gender, or ethnicity whose levels are selected, not manipulated. It is not a true independent variable because it is not manipulated. Moderator: a third variable that changes the relationship between two other variables. A crossed factorial design: creates all possible combinations of the independent variables. Main effect: the overall effect of one independent variable on the dependent variable, averaging over the levels of the other independent variable.