Conservatives may not like liberals, but they seem to understand them. In contrast, many liberals find conservative voters not just wrong but also bewildering.

One academic study asked 2,000 Americans to fill out questionnaires about moral questions. In some cases, they were asked to fill them out as they thought a “typical liberal” or a “typical conservative” would respond.

Moderates and conservatives were adept at guessing how liberals would answer questions. Liberals, especially those who described themselves as “very liberal,” were least able to put themselves in the minds of their adversaries and guess how conservatives would answer.

Now a fascinating new book comes along that, to a liberal like myself, helps demystify the right — and illuminates the kind of messaging that might connect with voters of all stripes. “The Righteous Mind,” by Jonathan Haidt, a University of Virginia psychology professor, argues that, for liberals, morality is largely a matter of three values: caring for the weak, fairness and liberty. Conservatives share those concerns (although they think of fairness and liberty differently) and add three others: loyalty, respect for authority and sanctity.