PSY 10A Lecture Notes - Lecture 1: Latin Square, Demand Characteristics, Random Assignment
Participants exposed to every condition or level of the independent variable. Examines difference within an individual on a dependent variable. More than two levels of the independent variable. Participants serve as their own control/comparison so it essentially eliminates person confounds. Leads to greater power to find a statistically significant effect. Order effects- exposure to one level of the independent variable changes/influences how participants react to another level of the independent variables. Vary the order in which participants experience the levels of the independent variable to cancel out order effects. Each participant is randomly assigned to get only one ordering of conditions. Each participant gets all ordering of conditions. All possible ordering of the conditions are used in the experiment. Only some ordering of conditions are used in the experiment. Latin square - each condition appears exactly once in each possible position. There are different people in the conditions or levels of the independent variable.