What might account for the amplitude difference of waves recorded from a subject tested alone, in a darkened room and subjects tested in a lab full of students? Explain for each of these experimental conditions.

Amplitude of waves recorded in a darkened room will be more accurate than Amplitudes recorded in a lab full of  students because there is more concentration and less noise  while recording the amplitude in a darkened room than in a lab full of students

Explanation:

Amplitude of waves recorded in a darkened room will be more accurate than Amplitudes recorded in a lab full of  students because there is more concentration and less noise  while recording the amplitude in a darkened room than in a lab full of students ,