Prashanth Is Participating in a Psychology Experiment in Which He

Prashanth is participating in a psychology experiment in which he is asked to gradually shrink the image of a square on his computer screen until he can just barely see that it is smaller than
A second square on the screen.Prashanth is trying to create a

A) signal detection.
B) absolute threshold.
C) just-noticeable difference.
D) sensory adaptation.