A researcher wants to study the effect of three treatments, social class, and gender on a dependent variable. The best design to use is
a. counterbalanced. c. factorial.
b. one-group time series. d. randomized control group pretest-posttest.
Question 2
Indicate whether the following statements are true or false. It is more difficult to determine the score reliability than the score validity of a measuring instrument.
a. true b. false