Dr English Wants to Test an Incentive Program to Increase

Multiple Choice

Dr. English wants to test an incentive program to increase attendance in her classes. For the first eight weeks of the semester, she does not use the program and records attendance rates each week. Then she initiates the incentive program for the last eight weeks and continues to record attendance rate each week. She detects an increase in attendance over the last eight weeks. What design did Dr. English use?

A) Nonequivalent comparison-group design
B) Posttest-only design
C) Interrupted time-series design
D) One group pretest-posttest design