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.”