A researcher presents two lights of varying brightness to a subject who is asked to respond same or different by comparing their intensities.The researcher is seeking the __________ threshold.
A) difference
B) absolute
C) subliminal
D) phosphene

Question

Quizplus · Accepted Answer

The researcher is seeking the threshold at which the subject can detect a difference in brightness between the two lights. This is known as the difference threshold. Absolute threshold refers to the minimum intensity needed for a stimulus to be detected. Subliminal threshold refers to stimuli that are below the level of conscious awareness. Phosphene refers to the perception of light that occurs when there is no actual light entering the eye, such as when pressure is applied to the eye.

A Researcher Presents Two Lights of Varying Brightness to a Subject