Demetri is a participant in an auditory detection study using the method of constant stimuli. He never detects the 10 unit tone. He detects the 20 unit tone 25% of the trials. He detects the 30 unit tone 50% of the trials. He detects the 40 unit tone 80% of the trials. He detects the 50 unit tone 95% of the trials. His threshold for hearing tones would be taken as the
A) 15 unit tone.
B) 20 unit tone.
C) 30 unit tone.
D) 55 unit tone.

Question

Quizplus · Accepted Answer

The threshold for hearing tones is defined as the level at which the participant can detect the tone 50% of the time. In this case, Demetri detects the 30 unit tone 50% of the trials, which means this level is his threshold for hearing tones. Therefore, choice C is the correct answer.

Demetri Is a Participant in an Auditory Detection Study Using