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Related Experiment Videos

Variability in the Precision of Children's Spatial Working Memory.

Elena M Galeano Weber1,2, Judith Dirk3,4, Florian Schmiedek5,6

  • 1German Institute for International Educational Research (DIPF), Frankfurt am Main, Frankfurt 60486, Germany. elena.galeano-weber@dipf.de.

Journal of Intelligence
|June 5, 2019
PubMed
Summary

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Children's spatial working memory (WM) performance varies moment-to-moment. This study shows that variability in spatial precision, not just accuracy, is key to understanding WM development in children.

Area of Science:

  • Cognitive Psychology
  • Developmental Psychology
  • Neuroscience

Background:

  • Adult cognitive modeling links visual working memory (WM) capacity to representational precision and variability.
  • Children's visuospatial WM is often assessed by accuracy, a limited measure of storage precision.

Purpose of the Study:

  • To investigate if and how children's WM performance is influenced by spatial precision and its temporal variability in real-world settings.
  • To explore the relationship between spatial precision variability and cognitive abilities in children.

Main Methods:

  • 110 3rd and 4th graders completed a spatial WM updating task via smartphone over four weeks, multiple times daily.
  • Hierarchical modeling analyzed spatial precision (Euclidean distance) to estimate variability across item, trial, and time scales.
Keywords:
ambulatory assessmentcognitive developmenthierarchical modelingintra-individual variabilitymicro-longitudinal designspatial precisionworking memory updating

Related Experiment Videos

  • Measures included spatial precision, its variability, and fluid intelligence assessments.

    • Main Results:

    • Significant within-person variability in spatial precision was observed across items, trials, and time (daily, day-to-day).
    • Item-to-item precision variability increased with memory load and decreased with higher grade level.
    • Greater precision variability correlated with lower fluid intelligence scores in children.

    Conclusions:

    • Transient fluctuations in spatial precision play a crucial role in the development of children's working memory.
    • Assessing spatial precision variability offers deeper insights into children's visuospatial WM than accuracy alone.
    • Real-world, longitudinal data collection provides a nuanced understanding of WM development.