11 - Factorial Experiments Flashcards
Crossed factorial design
Hey study in which researches cross two or more independent variables, or factors, and study each possible combination of the levels of the variables.
Cell
A condition in an experiment. The cell can represent the level of one independent variable in a simple experiment or one of the possible combinations of two independent variables in a factorial design.
Factorial design
A study in which there are two or more independent variables, or factors.
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.
Main effect
In a factorial design, the overall effect of one independent variable on the dependent variable, averaging over the levels of the other independent variable.
Marginal means
In a factorial design, the means for each level of an independent variable, averaging over the levels of another independent variable.
Nested factorial design
A study with more than one independent variable, in which levels of one independent Drupal 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 (or measure), not manipulated.