Event boundaries shape temporal organization of memory by resetting temporal context.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Computational Modeling

Background:

• Continuous experiences are segmented into discrete events in memory.
• Event boundaries are known to influence memory's temporal organization.
• The precise mechanisms by which event boundaries shape temporal order memory (TOM) are not fully understood.

Purpose of the Study:

• To investigate the dual role of event boundaries on temporal order memory (TOM).
• To explore how event length and position influence TOM.
• To develop a computational model explaining the effects of event boundaries on TOM.

Main Methods:

• Four behavioral experiments were conducted to assess TOM under varying event structures.
• Participants' memory for item order was tested across different event lengths and positions.
• A computational model simulating temporal context drift and reset at event boundaries was developed.

Main Results:

• Event boundaries were found to improve TOM for items within an event but impair TOM for items across events.
• Decreasing event length enhanced TOM, particularly for items in earlier positions within an event (local primacy effect).
• The computational model successfully replicated all observed behavioral results.

Conclusions:

• Event boundaries play a dual role in shaping temporal order memory.
• A unified algorithmic mechanism involving temporal context drift and reset at boundaries explains these effects.
• This reconciles paradoxes regarding how both contextual similarity and dissimilarity can promote TOM.