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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Memory Research

Background:

  • Recalling past experiences often takes less time than their actual occurrence.
  • Temporal compression in memory is a known phenomenon, but its dependence on event characteristics is not fully understood.

Purpose of the Study:

  • To investigate how the number and duration of events in a sequence affect temporal compression in memory.
  • To determine if working memory capacity for naturalistic events is limited by event sequence length and individual event duration.

Main Methods:

  • Participants watched short videos of 1-3 continuous events, each lasting 3-12 seconds.
  • Memory for event duration and temporal compression were measured during mental replays.
  • Exploratory analyses examined the role of visual imagery capacity.

Main Results:

  • Temporal compression was selective, occurring more for longer events.
  • Events in a sequence were replayed faster than isolated events, with this effect amplified for longer events.
  • Visual imagery capacity predicted individual differences in memory compression.

Conclusions:

  • Working memory capacity for naturalistic events is constrained by both the number and duration of events.
  • These findings help explain the temporal compression observed in episodic memory recall.