Answer:
This question is incomplete. Here are the missing options:
The answer is A) absolute threshold.
Explanation:
The absolute threshold is described as the minimal degree of a stimulus that can be identified by a person or animal. In this example, the researcher is trying to find the absolute threshold for touch, but it also applies for other senses. For example, the absolute threshold for hearing is usually measured by gradually increasing a sound frequency until the person can detect it.
To be considered as an absolute threshold, the subject must identify the stimulus at least 50% of the time.
