Online buzz surrounding Senators Barack Obama and John McCain remained strong during the three presidential debates in September and October, but voters’ engagement in the debate TV broadcasts declined significantly after the first debate, according to an analysis released Tuesday by Nielsen IAG and Nielsen Online.
“Engagement” refers to the amount of attention paid to a television program by the average viewer.  Nielsen measures TV engagement by questioning a representative panel of viewers about their recall of specific telecasts’ content.
Online consumer discussion of both candidates spiked before and after each of the four …