A human resources psychologist is interested in the effect of work schedule on job satisfaction. She compares satisfaction scores of workers who work five 8-hour shifts with workers who work four 10-hour shifts. What type of design has the manager employed?
a. One-group posttest-only design
b. Non-equivalent pretest-posttest design
c. One-group pretest-posttest design
d. Non-equivalent control group design
Answer: Non-equivalent control group design