Which of the following is a quasi-experimental design?
a. ex post facto
b. multiple time series
c. nonequivalent before-after
d. all of these
Question 2
The nonequivalent before-after design controls for ____ but not for ____.
a. history; maturation
b. history; selection-maturation
c. maturation; history
d. selection-maturation; the Hawthorne effect