Then you’re probably a conservative.

But if you would slap me, then you’re probably a liberal. I think…

Nicholas Kristof has the latest science on how our political and cultural leanings are products of our neurons:

Would you be willing to slap your father in the face, with his permission, as part of a comedy skit?

And, second: Does it disgust you to touch the faucet in a public restroom?

Studies suggest that conservatives are more often distressed by actions that seem disrespectful of authority, such as slapping Dad. Liberals don’t worry as long as Dad has given permission.

Likewise, conservatives are more likely than liberals to sense contamination or perceive disgust. People who would be disgusted to find that they had accidentally sipped from an acquaintance’s drink are more likely to identify as conservatives.

Moreover, “talking it out,” like here on the blog, doesn’t help. It only reinforces our biases. Think it’s silly? Read on for what does work:

A start is to reach out to moderates on the other side — ideally eating meals with them, for that breaks down “us vs. them” battle lines that seem embedded in us. (In ancient times we divided into tribes; today, into political parties.) The Web site www.civilpolitics.org is an attempt to build this intuitive appreciation for the other side’s morality, even if it’s not our morality.

“Minds are very hard things to open, and the best way to open the mind is through the heart,” Professor Haidt says. “Our minds were not designed by evolution to discover the truth; they were designed to play social games.”

A very religious sentiment, one might say. Go ahead, take the test here.