False memory implantation in adults is easy
In another study, family members of research subjects provided the experimenters with childhood photos of the subjects, and the experimenters photoshopped one image into a hot air balloon ride. [1]Over the course of a few interviews where the subjects tried to recall memories related to the photos, half of the participants developed clear, or partially clear, false memories of the hot air balloon, despite it never having happened, and adding invented details that they truly believed. When the photos were revealed to be faked, many of them were flabbergasted, having convinced themselves that it had happened.1. https://link.springer.com/article/10.3758/BF03196318