Professor James uses a system that requires a subject to press a button as soon as they see a light blink. He is measuring their reaction time. Unfortunately, his equipment is not working properly and every reaction time recorded randomly fluctuates by plus or minus 10%. You would conclude that the readings obtained with the equipment are:

Question

Quizplus · Accepted Answer

The readings are not reliable because they fluctuate randomly, and they are not valid because they do not accurately measure the true reaction time due to the random error.

Professor James Uses a System That Requires a Subject to Press