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.
Question 2
The simplest of all experimental designs is the two-group posttest-only randomized experiment.
a. True
b. False
Indicate whether the statement is true or false