Opal has great hearing. She knows this because she participated in a psychology experiment in which the researchers determined her , which is the weakest stimulus she can detect 50 percent of the time.

absolute threshold

Explanation:

An absolute threshold can be described as the lowest level of stimulus that an organism is capable of detecting. The stimulus might be anything like sound, light etc.

As Opal has the capability to recognize the weakest stimulus which is the threshold, she can say that she has a great hearing.

autism affects an estimated 1 in 59 children. many people with sensory issues. these can include aversions to certain sights, sounds and other sensations.