Do ghosts and the "undead" really exist?

• Position: Psychology - Brief article

For a sizable number of U.S. adults, ghosts are more than just pranksters in costume for Halloween.

A poll by Zogby Interactive, Utica, N.Y., found that 37% say they believe in human or animal ghosts; 23% maintain they have been visited by a dead relative or friend, and 20% insist they have seen or heard a ghost. Another 22% reveal that, while they have not experienced a ghost they know someone who claims to have had such an encounter.

This is a topic that seems to capture the imagination of respondents, as three in 10 indicate they...