"These photographs are long exposures taken while playing video war games of the 80's created by Atari, Centuri and Taito. The photographs were shot from video game screens while I played the games. By recording each second of an entire game on one frame of film, I captured complex patterns not normally seen by the eye."

The idea of repressed memory -- when traumatic events are wiped from a person's conscious memory but resurface years later -- has had a chequered past. Some have cited it as evidence in court, yet others dismiss it as nothing more than psychiatric folklore.

A new study adds a literary layer of evidence to the debate. To see how long the idea of repressed memories have been around, a group of psychologists and literature scholars turned to historical writings.

They could not find a single description of repressed memory, also referred to as dissociative amnesia, in fiction or factual writing before 1800.