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Updated Friday, January 4, 2013 at 10:03 PM

You're not the person you were — or likely will be

By JOHN TIERNEY
The New York Times

When we remember our past selves, they seem quite different. We know how much our personalities and tastes have changed over the years. But when we look ahead, we expect ourselves to stay the same, a team of psychologists said Thursday, describing research they conducted of people's self-perceptions.

They called this phenomenon the "end-of-history illusion," in which people tend to "underestimate how much they will change in the future." According to their research, which involved more than 19,000 people ranging in age from 18 to 68, the illusion persists from teenage years into retirement.

"Middle-aged people — like me — often look back on our teenage selves with some mixture of amusement and chagrin," said one of the authors, Daniel Gilbert, a psychologist at Harvard.

"What we never seem to realize is that our future selves will look back and think the very same thing about us. At every age we think we're having the last laugh, and at every age we're wrong."

Other psychologists said they were intrigued by the findings, published Thursday in the journal Science, and impressed with the amount of supporting evidence.

Participants were asked about their personality traits and preferences — favorite foods, vacations, hobbies and bands — in years past and present, and then asked to make predictions for the future.

Not surprisingly, the younger people in the study reported more change in the previous decade than did the older respondents. But when asked to predict what their personalities and tastes would be like in 10 years, people of all ages consistently played down the potential changes ahead.

Thus, the typical 20-year-old woman's predictions for her next decade weren't nearly as radical as the typical 30-year-old woman's recollection of how much she had changed in her 20s. This sort of discrepancy persisted among respondents all the way into their 60s.

The discrepancy didn't seem to be because of faulty memories, because the personality changes recalled by people jibed quite well with independent research charting how personality traits shift with age.

People seemed to be much better at recalling their former selves than at imagining how much they would change in the future.

Why? Gilbert and his collaborators, Jordi Quoidbach of Harvard and Timothy Wilson of the University of Virginia, had a few theories, starting with the well-documented tendency of people to overestimate their own wonderfulness.

"Believing that we just reached the peak of our personal evolution makes us feel good," Quoidbach said. "The 'I wish that I knew then what I know now' experience might give us a sense of satisfaction and meaning, whereas realizing how transient our preferences and values are might lead us to doubt every decision and generate anxiety."

Or maybe the explanation has more to do with mental energy: Predicting the future requires more work than simply recalling the past.

"The end-of-history effect may represent a failure in personal imagination," said Dan McAdams, a psychologist at Northwestern, who has done separate research into the stories people construct about their past and future lives.

He has often heard people tell complex, dynamic stories about the past but then make vague, prosaic projections of a future in which things stay pretty much the same.

McAdams was reminded of a conversation with his 4-year-old daughter during the craze for Teenage Mutant Ninja Turtles in the 1980s. When he told her they might not be her favorite thing one day, she refused to acknowledge the possibility.

But later, in her 20s, she confessed that some part of her 4-year-old mind had realized he might be right.


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