Answer:
Absolute threshold
Explanation:
Absolute threshold: In psychology, the term absolute threshold is defined as the phenomenon through which an individual can detect an external stimulus by putting forward the smallest level of his or her energy, for example, touch, vision, taste, hearing, and smell.
In other words, it is referred to as the intensity's degree of a particular stimulus which is required to accurately figure-out that specific stimulus at least fifty-percent of the time.
In the question above, the given statement represents the absolute threshold.