Colbert04 Nielsen has released a study that proves what we’ve suspected all along: There are “Colbert Democrats” and “South Park Republicans.”

The research firm did a study of viewer “engagement,” that is the amount of attention paid to a television program by the average viewer. The company says it “measures TV engagement by questioning a representative panel of viewers about their recall of specific telecasts’ content.” The measurement was made only of cable shows.

As they found out, Democratic viewers paid most attention to “The Colbert Report” and Republicans paid close eye on “South Park.”

Southpark_051230112227534_wideweb__ Other showswith high scores among Democrats: “Deadliest Catch,” “It’s Always Sunny in Philadelphia,” “Ax Men,” “Tin Man,” “My Boys” and “I Love New York.”

Others with high scores among Republicans: “Cash Cab,” “Damages,” “Battle 360,” “Doctor Who,” “The Bill Engvall Show” and “Rock of Love with Bret Michaels.”

But unless you think that America is hopelessly divided, Nielsen says that the shows with the highest engagement scores also got the highest level of bipartisan support. They included A&E’s “The Cleaner,” Bravo’s “Real Housewives of Orange County” and Food Network’s “The Next Food Network Star.”

The complete list is here.