Final answer:
The sensory thresholds include the absolute threshold and the just noticeable difference (JND) threshold. The absolute threshold is the minimum amount of stimulus energy required to be detected 50% of the time, while the JND threshold is the minimum difference in stimulus intensity required to detect a difference between two stimuli.
Step-by-step explanation:
The sensory thresholds refer to the minimum amount of stimulus energy required for the stimulus to be detected. The absolute threshold is the minimum amount of stimulus energy that must be present for the stimulus to be detected 50% of the time. For example, the absolute threshold for vision is the minimum amount of light that can be detected by the eye. The just noticeable difference (JND) threshold, on the other hand, is the minimum difference in stimulus intensity required for a person to detect a difference between two stimuli. It depends on the original stimulus intensity, and can vary depending on the context. Weber's law states that the difference threshold is a constant fraction of the original stimulus.