"many of the experimental participants who were asked how fast two cars in a filmed traffic accident were going when they smashed into each other subsequently recalled seeing broken glass at the scene of the accident. this experiment best illustrated"

This experiment best illustrated the misinformation effect. It usually occurs occurs when misleading information is incorporated into one's memory after a particular event. As you can see, there is a post-event information represented above, and when it is already delivered, a person's recall of episodic memories becomes less accurate.