The difference threshold is defined as the stimulus level at which a change in a sensory signal is detected ________ percent of the time.
A) 50
B) 100
C) 75
D) 25

Question

Quizplus · Accepted Answer

The difference threshold is also known as the just noticeable difference (JND) and is defined as the smallest detectable difference between two stimuli. The threshold is typically determined by presenting two stimuli (one slightly stronger than the other) and asking the participant to report which one was stronger. The threshold is the level at which the difference is detected 50% of the time. Therefore, the correct answer is A) 50.

The Difference Threshold Is Defined as the Stimulus Level at Which