How Can Variance Be Reduced in a Between-Subjects Design?​

question 20

Multiple Choice

How can variance be reduced in a between-subjects design?​

• A)​Use counterbalancing.
• B)​Use a factorial design adding a participant variable (such as age) as a second factor.
• C)Use a factorial design with the order of treatments as a second factor
• D)​Reduce the strength of the treatment.