Nested contextual change and the temporal compression of episodic memory

A research team from France has created a virtual reality (VR) environment to study how the quantity of information within nested structures affects participants' memory of events. Participants navigated through a series of virtual rooms, each containing images arranged randomly on a 3x3 grid. They were asked to recall the content (old/new), timing (timeline location), and location (grid position) of the images they experienced.

The study tested two types of nested events: 6 rooms with 4 images each and 3 rooms with 8 images each, all lasting the same amount of time. The findings revealed a strong temporal compression effect, where participants remembered early items and events occurring later, and later items and events occurring earlier than the original experience.

Additionally, presenting four-item events led to a greater compression rate than eight-item events. The study also found that there were greater temporal distances between pairs of items occurring within eight-item events than pairs of items that occurred on either side of a boundary. The researchers concluded that memory for when depends on the nested compression of information within events.