Neil Is Seated in a Dark Room and Asked to Look

Multiple Choice

Neil is seated in a dark room and asked to look at a screen. He watches as flashes of light, varying in brightness, are shown on the screen one at a time. Whenever he notices a flash, he informs the researchers. What are the researchers measuring?

A) Neil's anatomical encoding of brightness
B) Neil's absolute threshold for brightness
C) Neil's functional encoding of brightness
D) Neil's difference threshold for brightness