Look a little closer
Memory is not a video file that preserves an event unchanged. Psychologists call it the misinformation effect when misleading descriptions or suggestive questions encountered afterward become mixed into later reports.
A common experiment first shows people an event, then introduces an incorrect detail before testing what they remember. Across many studies, participants become more likely to report the post-event misinformation instead of the original detail.
This does not mean every original memory is erased. Researchers have examined several mechanisms, including weakened traces, competition during retrieval, response demands and confusion about where information came from. Susceptibility also differs across conditions and people.
Errors become especially plausible when source is forgotten. A detail seen during the event and one later heard from a news report or another person may both feel familiar. The mind can mistakenly attribute that familiarity to the original experience.
That is why repeated or leading questions require care in eyewitness interviews. Recording accounts independently before witnesses influence one another, and using open, neutral wording, can help protect the information people actually retained.
The misinformation effect does not declare that no memory can be trusted. It shows that a generally useful system reconstructs the past and can absorb later input. Strong confidence alone therefore cannot guarantee that every remembered detail is accurate.
