From a talk by someone with Social Fiction:

Perhaps you remember the main character in Albert Camus’ novel The Stranger who commits a murder for now other reason than the way the ocean reflects the sun in his eyes. This is a very clear & powerful example of a psychogeographical effect, an effect that can be consciously engineered in the composition of the city.

William Burroughs tried to expose subliminal messages in newspapers by chopping them up, psychogeography as a city space cut-up does the new thing: it tries to find out what’s out there, encrypted beneath the surface, by navigating through it in unusual ways.

Link.