In surveys, about two-thirds of adults report having had at least one deja vu experience, and the odd sensation seems to occur most often in people with lively, frequently stimulated imaginations. People who travel a lot are more likely to report the experiences than homebodies, for instance, and those with college or advanced degrees report having it more often than others, perhaps because they have encountered its sweet strangeness in the literary accounts of Proust and Tolstoy — or are more likely to rent the movie “Groundhog Day.” Rates seem to peak in young adulthood and to fall off gradually through retirement age, when, Dr. Brown suggests, many people live daily routines that really are familiar.

—Deja Vu: If It All Seems Familiar, There May Be a Reason, New York Times