The experimental approach to research starts with groups that are ____ on significant variables, while the ex post facto approach starts with groups that are ____ on significant variables.
a. different; equivalent b. equivalent; different
Question 2
Which of the following would represent a variable that could be manipulated in an experiment?
a. Lecture vs. discussion method of teaching
b. High vs. low socioeconomic status of subjects
c. Male vs. female subjects
d. College prep vs. vocational curriculum
e. High vs. low scorers on an aptitude test