Nearly one in five Americans mistakenly believes that President Obama is Muslim, according to a new report from the Pew Research Center -- and that was before he came out in support of the right to build a mosque near Ground Zero in Lower Manhattan. What other opinions, habits, surmises, hopes and fears do 20 percent of us share? Recent surveys and studies show that one in five Americans also . . .

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. . . thinks socialism is superior to capitalism, according to a 2009 Rasmussen survey.

. . . reports "excessive sleepiness," according to a recent study by Stanford University's Sleep Epidemiology Research Center.

. . . believes that the harsh techniques used to interrogate terrorism suspects after Sept. 11, 2001, were torture but still legitimate, according to a 2009 CNN poll.

. . . fears job loss in the next 12 months, according to a recent Gallup poll.

. . . believes in the right of a state to secede, according to a 2008 Zogby poll.

. . . thinks marijuana is more dangerous than alcohol, according to a recent Rasmussen poll.

. . . believes that intelligent beings from other planets have made contact with humans on Earth, according to a 2006 CBS News poll.

. . . skips medical care when sick or injured, according to a Deloitte survey released this month.

. . . believes that the government "enjoys the consent of the governed," according to a February Rasmussen telephone survey.

. . . admits to peeing in pools, according to a 2009 survey by the Water Quality and Health Council.

moyerj@washpost.com