If you're among the millions planning to watch tonight's Democratic presidential debate, remember that it's politics, not sports.

"Who is winning is not as important as who has the right answer," said Alfred C. Snider, who has taught argumentation, persuasion and presidential campaign rhetoric at the University of Vermont for 25 years. "The 'race' is about what masses of other people think. This debate should be used to try and determine what you think."

Experts offer these viewing tips:

• Listen actively. Switch from passive, entertainment mode to learning mode. Pay attention.

• Focus on substance, not style. The candidates' clothes, facial expressions and hair style aren't too important. Their plans and policies are.

• Ignore diversionary tactics. Candidates try to divert attention by attacking the questioner, or by relying on dismissal, digression and obfuscation. Focus on issues important to you.

• Keep an open mind. Set aside personal political biases as much as possible.

• Turn off the TV when it's over. The spin zone and post-debate analysis are designed to influence you. Make up your own mind.

ajohnson@dispatch.com