Misinformation Effect

The tendency for post-event information to interfere with the memory of the original event.

A witness to a car accident reads a news article that incorrectly states the traffic light was red. Later, they genuinely remember seeing a red light, even though it was actually green. The post-event information from the article has become integrated into the witness's memory of the actual event.
Parents repeatedly tell their child about a family vacation, including details the child was too young to actually remember. As an adult, the person believes they have vivid memories of the trip. The stories heard over the years have created false memories that feel authentic.

Note

Pioneered by Elizabeth Loftus through her extensive research on eyewitness memory starting in the 1970s.

This is a common bias