Consider a multiple-choice exam with four alternatives per question.What score (in terms of percentage correct)defines a floor effect?
A) 0
B) 25
C) 50
D) 75
E) 100

Question

Quizplus · Accepted Answer

A floor effect occurs when a test is so difficult that the majority of examinees perform at the low end of the score range. Since there are four alternatives per question, guessing on each question would, on average, yield a correct answer 25% of the time, establishing the floor effect at 25%.

Consider a Multiple-Choice Exam with Four Alternatives Per Question