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Visual short-term memory in the first year of life: capacity and recency effects

S A Rose1, J F Feldman, J J Jankowski

  • 1Department of Pediatrics, Albert Einstein College of Medicine/Children's Hospital at Montefiore, Bronx, New York 10461, USA. srose@aecom.yu.edu

Developmental Psychology
|July 11, 2001
PubMed

Insights

Infant short-term memory capacity increases significantly during the first year of life. This study tracked memory spans in full-term and preterm infants, finding improved recall with age.

Area of Science:

  • Developmental Psychology
  • Cognitive Neuroscience
  • Infant Cognition

Background:

  • Short-term memory is crucial for cognitive development.
  • Understanding infant memory capacity informs developmental milestones.
  • Previous research has explored infant memory with varying methodologies.

Purpose of the Study:

  • To assess short-term memory capacity in infants using a novel span task.
  • To investigate memory development longitudinally in the first year of life.
  • To compare memory performance between full-term and low-birth-weight preterm infants.

Main Methods:

  • Developed a span task presenting 1-4 items successively.
  • Tested recognition memory by pairing items with novel ones.
  • Recruited a large sample of full-term and preterm infants (<1,750g).
  • Conducted longitudinal assessments at 5, 7, and 12 months of age.

Main Results:

  • Memory span difficulty increased with item number, especially at younger ages.
  • Infant memory capacity significantly increased from 5 to 12 months.
  • Nearly half of infants recalled 3-4 items by 12 months, up from <25% earlier.
  • A recency effect (better recall of the last item) was observed for spans of 3-4 items.
  • Modest stability in individual memory differences was noted across ages.

Conclusions:

  • Infant short-term memory capacity undergoes substantial development within the first year.
  • The span task effectively measures infant memory, showing developmental trends.
  • Preterm infants' memory development appears comparable to full-term infants in this task.
  • Findings highlight the dynamic nature of early cognitive abilities and memory consolidation.

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