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Implicit versus explicit memory function in children with Down and Williams syndrome.

S Vicari1

  • 1IRCCS, Ospedale Pediatrico Bambino Gesù, Santa Marinella, Roma, Italy.

Down'S Syndrome, Research and Practice : the Journal of the Sarah Duffen Centre
|November 15, 2001
PubMed
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Children with Williams syndrome demonstrated intact implicit memory, specifically repetition priming, but impaired procedural learning. Down syndrome individuals showed typical implicit memory but lower explicit memory compared to controls.

Area of Science:

  • Cognitive Neuroscience
  • Developmental Psychology
  • Neurodevelopmental Disorders

Background:

  • Williams syndrome and Down syndrome are genetic conditions associated with intellectual disabilities and distinct cognitive profiles.
  • Understanding memory processes in these populations offers insights into cognitive development and neurobiology.

Purpose of the Study:

  • To evaluate implicit memory in Williams syndrome, comparing it to Down syndrome and typically developing children.
  • To assess verbal and visuo-perceptual explicit memory, repetition priming, and procedural learning across groups.

Main Methods:

  • Administered tests of explicit memory, verbal and visual repetition priming, and procedural learning.
  • Included 12 participants with Williams syndrome, 14 with Down syndrome, and 32 typically developing children (mental-age matched).

Related Experiment Videos

Main Results:

  • Williams syndrome participants showed implicit memory (repetition priming) comparable to controls.
  • Children with Williams syndrome exhibited reduced learning rates in procedural tasks.
  • Down syndrome individuals displayed comparable implicit memory abilities.
  • Typically developing children outperformed individuals with Down syndrome on explicit memory tasks.

Conclusions:

  • Implicit memory, particularly repetition priming, appears relatively preserved in Williams syndrome.
  • Procedural learning is impaired in Williams syndrome, suggesting specific deficits.
  • Down syndrome is characterized by intact implicit memory but lower explicit memory performance.
  • These findings contribute to understanding cognitive anomalies in intellectual disabilities and their neurobiological underpinnings.