By C. Da Costa

Participants questioned by a generative AI chatbot produced more than three times as many false memories as those in a control group. That finding, from MIT Media Lab’s research on synthetic human memories, is not about edge cases confined to a lab.

The MIT study tested 200 participants who viewed original photographs and later encountered either unchanged images, AI-edited images, AI-generated videos, or AI-generated videos based on AI-edited images. The combined video condition produced false memories at 2.05 times the control rate, with confidence in those false memories running 1.19 times higher than the control condition, according to the MIT Media Lab project page.

In a separate simulated crime-witness experiment, the same MIT team found that 36.4% of responses in the chatbot condition were misled through the interaction itself. Those false memories persisted one week later, with participants retaining elevated confidence in details that never happened.

A parallel study from Georgetown University and the University of Washington tested how AI-generated summaries affect memory for a witnessed event. Participants watched a video of a car-pedestrian accident, then read either an accurate summary or one containing a wrong detail about a traffic sign.

Georgetown’s report says that 83.6% of participants who read an accurate summary recalled the relevant sign correctly. That figure fell to 44.8% among participants who read a misleading AI summary.

Crucially, telling participants the summary was AI-generated did not eliminate the distortion, according to Georgetown’s published findings.