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Single Factor Experimental Designs



1. Single Factor Two Levels: the simplest of all experimental designs; uses one IV which has two levels.
 

a. Between-Subjects, Single-Factor Designs not very common; too simple

b. Within-Subjects, Single-Factor Designs need to worry about counterbalancing:

c. Analyzing Single-Factor, Two-Level Designs:


2. Single Factor More Than Two Levels: Most single-factor studies use three or more levels
 

a. Between-Subjects, Multilevel Designs -- A distinct advantage of multilevel designs is that they enable the researcher to discover NONLINEAR EFFECTS

b. Within-Subjects, Multilevel Designs counterbalancing

c. Presenting the data

d. Analyzing Single-Factor, Multilevel Designs -- ANOVA