You Won’t Stay the Same, Study Finds

Or maybe the explanation has more to do with mental energy: predicting the future requires more work than simply recalling the past. “People may confuse the difficulty of imagining personal change with the unlikelihood of change itself,” the authors wrote in Science.

The phenomenon does have its downsides, the authors said. For instance, people make decisions in their youth — about getting a tattoo, say, or a choice of spouse — that they sometimes come to regret.

And that illusion of stability could lead to dubious financial expectations, as the researchers showed in an experiment asking people how much they would pay to see their favorite bands.

When asked about their favorite band from a decade ago, respondents were typically willing to shell out $80 to attend a concert of the band today. But when they were asked about their current favorite band and how much they would be willing to spend to see the band’s concert in 10 years, the price went up to $129. Even though they realized that favorites from a decade ago like Creed or the Dixie Chicks have lost some of their luster, they apparently expect Coldplay and Rihanna to blaze on forever.

“The end-of-history effect may represent a failure in personal imagination,” said Dan P. 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.

Dr. 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 to him that some part of her 4-year-old mind had realized he might be right.

“She resisted the idea of change, as it dawned on her at age 4, because she could not imagine what else she would ever substitute for the Turtles,” Dr. McAdams said. “She had a sneaking suspicion that she would change, but she couldn’t quite imagine how, so she stood with her assertion of continuity. Maybe something like this goes on with all of us.”