When was the general amplitude of the EEG highest? D. Refer to Table 4.1: When were the alpha wave levels highest? E. Refer to Table 4.1: How do your results compare with the information presented in the Introduction? No F. Did Subject need to concentrate during math problems? Yes How would the level of concentration required affect the data? G. 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? H. Which conditions produced the lowest alpha activity?