Research Methods, Week 10 notes
Research Methods, Week 10 notes Psych 305
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This 2 page Class Notes was uploaded by Clarissa Hinshaw on Sunday April 3, 2016. The Class Notes belongs to Psych 305 at Northern Illinois University taught by Keith Millis in Winter 2016. Since its upload, it has received 37 views. For similar materials see Research Methods in Psychlogy at Northern Illinois University.
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Date Created: 04/03/16
Chapter 10 Complex Experimental Designs Many experiments will have more than one condition to find a more exact cause or they want to compare more than 2 groups. Often more than 1 independent variable is manipulated in an experiment. Factorial design: designs with more than 1 independent variable. o 2x2 is most common with 2 independent variables and 2 levels. o This results in 4 experimental conditions. Main effect: the most common effect of the independent variable. Interaction: the two independent variable working with one another. IV x PV designs: includes experimental and nonexperimental variables. Moderator variable: this influences how the 2 variables communicate with each other. The independent variables don’t always have an effect on each other. The independent and dependent variables aren’t always labeled. Analysis of variance analyzes significance in a factorial design’s measures. Simple main effects: looks at differences in each level of an independent variable. Participants are assigned to conditions in 2 ways: independent groups and repeated measures. Mixed factorial design: the combination of the 2 above methods. A 2x2 factorial design has 4 conditions. A completely independent design exposes participants to each condition. Adding levels to the independent variables increases complexity.