A researcher wants to investigate the effectiveness of three versions of a computer-assisted instructional (CAI) program in math on the achievement of elementary school students in math. The researcher wants to know if the effectiveness of the program would depend on the math aptitude (classified as above and below average) and the gender of the students. What experimental design would you recommend for this study?
a. 1 x 2 x 3 factorial design
b. 3 x 2 x 2 factorial design
c. Solomon three-group design
d. Randomized subjects, pretest-posttest, control group design
e. None of these is true.
Ques. 2In an experiment, a researcher believes that by manipulating Variable A he can cause changes in Variable B. However, Variable C is actually causing changes in Variable B. Variable C is a(n) ____ variable.
a. independent c. extraneous
b. dependent d. attribute
Ques. 3In an experimental study using pre- and posttests, which of the following instruments is most likely to have a reactive effect?
a. Arithmetic pretest
b. Scholastic aptitude test used for matching purposes
c. Film showing prejudice toward minorities
d. Divergent thinking pretest
Ques. 4The variable upon which the effects of the experimental treatment are observed is called the ____variable.
a. independent c. extraneous
b. dependent d. control
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