PSY-B - Psychology PSY-B 311 Lecture Notes - Lecture 14: Factorial Experiment, Dependent And Independent Variables, Repeated Measures Design

• School: IUPUI
• Department: PSY-B - Psychology
• Course: PSY-B - Psychology PSY-B 311
• Professor: Robert Stewert

Document Summary

Manipulate two or more independent variables (ivs referred to as factors) within single experiment e. g. , 2 x 2 factorial design. Two ivs, each with 2 levels e. g. , 3 x 3 factorial design. Two ivs, each with 3 levels e. g. , 2 x 4 factorial design. Two ivs, one with 2 levels, one with 4 levels. Increasing complexity of design = increasing complexity of information provided. 2 2 2 2 with 15 ps/cell = 240 ps total. Can get out of control, especially with between-subjects designs example: 2 2 2 with 15 ps/cell = 120 ps total. Multiply levels to get total # of conditions in experiment example: 2 2 = 4 conditions. In same experiment, some ivs involve random assignment, others involve repeated measures. Effects of stress on drinking different concentrations of alcohol. 2 x 3 mixed-factors design stress x alcohol concentration. Different ps randomly assigned to stress or no stress groups.