Brenda is watching a movie at home but the sound on her television is rather low.She asks her brother to turn up the sound.After he increases the volume only 5 decibels,Brenda says "OK.That's good.Thank you." Brenda's detection of this slight increase in volume demonstrates

Question

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Brenda's ability to detect a slight increase in volume demonstrates her ability to detect the just noticeable difference, which is the smallest change in stimulus intensity that a person can detect.

Brenda Is Watching a Movie at Home but the Sound