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Related Experiment Videos

Memory development in the second year: for events or locations?

James Russell1, Doreen Thompson

  • 1Department of Experimental Psychology, Cambridge University, Downing Street, Cambridge, CB2 3EB, UK. jr111@cus.cam.ac.uk

Cognition
|April 10, 2003
PubMed
Summary
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Toddlers aged 21-25 months do not appear to possess event-based memories, instead relying on location memory. This study investigates early memory development in young children.

Area of Science:

  • Developmental psychology
  • Cognitive science
  • Comparative psychology

Background:

  • Episodic-like memory, the ability to recall specific past events, has been observed in non-human animals.
  • Understanding the origins of episodic memory in human infants is crucial for developmental psychology.

Purpose of the Study:

  • To investigate whether human infants in their second year of life possess event-based memories.
  • To differentiate between location memory and event memory in early childhood development.

Main Methods:

  • An object-placement/object-removal design, adapted from studies on scrub jays, was used.
  • Two tasks were employed: one allowing success via recall of object removal (event memory) and another requiring recall of object location (location memory).
  • Participants were children aged 21-25 months.

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Main Results:

  • Children in the oldest age group (21-25 months) showed general success across both tasks.
  • Performance was similar on the object-removal (event memory) and object-location (location memory) tasks.
  • This suggests that success was primarily driven by location memory, not event memory.

Conclusions:

  • The findings indicate that event-based memory may not be present in children in the second year of life.
  • Results are discussed in the context of object permanence development.
  • Further research is needed to understand the developmental trajectory of episodic memory.