Final answer:
The statement provided is false; the absolute threshold refers to the level at which a stimulus can be detected 50% of the time, not with absolute certainty.
Step-by-step explanation:
The statement that the absolute threshold is the intensity level at which a person has a 100% chance of detecting it is false. The absolute threshold is defined as the minimum amount of stimulus energy required to be detected 50% of the time. This means there are occasions when a stimulus below this threshold is detected, and occasions when it isn't, indicating a probability rather than a certainty.
The concept of absolute threshold is critical in understanding sensory perception as it marks the boundary between undetectable and detectable stimuli. It differs from the difference threshold, which refers to the smallest change in stimulus intensity that can be detected, and is influenced by the Weber-Fechner law. Moreover, this concept should not be confused with subliminal perception, which involves stimuli that are below the threshold of conscious awareness but can still have an impact on the sensory system.