Hierarchical event segmentation of episodic memory in virtual reality

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human-Computer Interaction

Background:

• Episodic memory relies on event segmentation, often driven by contextual shifts.
• Laboratory studies on event boundaries lack real-world ecological validity.
• Virtual reality (VR) offers a promising platform for studying memory in complex, interactive environments.

Purpose of the Study:

• To investigate the influence of perceptual (spatial) and conceptual boundaries on episodic memory within a naturalistic VR setting.
• To compare the impact of spatial versus conceptual boundary crossings on memory performance.
• To assess the role of top-down versus bottom-up processes in event segmentation during interactive tasks.

Main Methods:

• Participants engaged in a simulated sales task within a VR environment.
• Spatial boundaries were defined by visually distinct virtual booths.
• Conceptual boundaries were established by customer requests, and memory was tested using a recency discrimination task.

Main Results:

• Crossing spatial and conceptual boundaries impaired sequence memory recall.
• Conceptual boundary crossings had a significant impact on memory accuracy, whereas spatial boundary crossings did not.
• Memory confidence was highest when participants remained within defined spatial and conceptual events.
• Top-down conceptual processes appear to dominate over bottom-up perceptual processes in naturalistic event segmentation.

Conclusions:

• Conceptual boundaries play a more critical role than spatial boundaries in segmenting events and influencing episodic memory in interactive, naturalistic settings.
• Virtual reality is an effective tool for exploring hierarchical contextual influences on episodic memory.
• Findings suggest that memory quality is optimized when both spatial and conceptual event boundaries are maintained.