The smallest quantity of physical energy that can be reliably detected by an observer is called the:
A) just noticeable difference.
B) absolute threshold.
C) psychophysiological threshold.
D) difference threshold.

Question

Quizplus · Accepted Answer

The absolute threshold refers to the minimum intensity of a stimulus that can be detected by an observer. It is the smallest quantity of physical energy that can be reliably detected by an observer. The other options (A, C, and D) refer to different thresholds or concepts related to sensory perception, but do not specifically address the smallest detectable quantity of physical energy.

The Smallest Quantity of Physical Energy That Can Be Reliably