Professor Simpkins Designs a Self-Report Measure to Assess His Students

Multiple Choice

Professor Simpkins designs a self-report measure to assess his students' perceptions of a lesson plan. In one section he lectures on the course material. In another section of the same course he supplements his lecture with a class activity. Then, his students rate the educational value of the class. Unfortunately, Professor Simpkins doesn't learn anything about the distinction between lecturing and active learning, because both classes rated the education value as a three (very educational) on a scale from one to three. What is wrong with Professor Simpkins's research?

A) scorer bias
B) floor effect
C) ceiling effect
D) random error