Scenario K

Without informing his students, a professor uses one of his classes for a research study of cheating behavior. True-false exams are given at various points in the semester. After each test, the exams are collected, copied, and then returned to the students, who are told they will score their own tests. A comparison of student-graded exams with ungraded copies will reveal instances where students cheated by changing test answers. At the end of the semester, the professor tells his class about the research project in which they had participated unknowingly.