PSYC 2250 Chapter Notes - Chapter 10: Factorial Experiment, Analysis Of Variance, Statistical Hypothesis Testing

• School: University of Manitoba
• Department: Psychology
• Course: PSYC 2250
• Professor: Hladkyj

Document Summary

An independent variable can have more than two levels. In the simplest experimental design, the independent variable has only two levels. Levels: term sometimes used to denote conditions in an experimental design (also called groups or conditions) But sometimes a researcher might want to add more levels for different reasons. A design that only has two levels of the independent variable might not provide enough information about the exact form of the relationship between the independent and dependent variables. *independent variable with only 2 levels = t test. *independent variable with 3 or more = analysis of variance (anova) An experiment can have more than one independent variable: Researchers who manipulate two or three independent variables in a single experiment replicate a closer approximation of real-world conditions, in which independent variables interact with other variables to produce behavior. Factorial design: a design in which all levels of each independent variable are combined with all levels of the other independent variables.