Undecided voters were more engaged and attentive during the Republican National Convention (RNC) than during the Democratic National Convention (DNC), according to a media research firm.

Uncommitted voters were most engaged in Sen. John McCainJohn McCainA Cabinet position for Petraeus; disciplinary actions for Broadwell after affair Meet Trump’s ‘mad dog’ for the Pentagon Wrestling mogul McMahon could slam her way into Trump administration MORE's (R-Ariz.) Sept. 4 acceptance speech. The addresses by Sen. Barack ObamaBarack ObamaFor Trump, foreign policy should begin and end with China Harvard spat between Clinton, Trump camps proves Dems can't accept Trump's improving Wrestling mogul McMahon could slam her way into Trump administration MORE (D-Ill.) and Gov. Sarah Palin (R-Alaska) were the second most engaging programs to uncommitted voters. Nielsen also found that likely voters were 12 percent more attentive to the RNC than to the DNC.

McCain's speech drew a hefty 38.9 million viewers, 500,000 more than the 38.4 million viewers who watched Obama's Invesco Field acceptance speech the week before.

The research was conducted by Nielsen AIG, a firm which studies ads, product placement, and program sponsorship during television programs.

-Michael O'Brien