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Research Articles, Behavioral/Cognitive

Neither Enhanced Nor Lost: The Unique Role of Attention in Children's Neural Representations

Yaelan Jung, Tess Allegra Forest, Dirk B. Walther and Amy S. Finn
Journal of Neuroscience 24 May 2023, 43 (21) 3849-3859; DOI: https://doi.org/10.1523/JNEUROSCI.0159-23.2023
Yaelan Jung
1Department of Psychology, University of Toronto, Toronto, Ontario M5S 3G3, Canada
2Department of Psychology, Emory University, Atlanta, Georgia 30322
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Tess Allegra Forest
1Department of Psychology, University of Toronto, Toronto, Ontario M5S 3G3, Canada
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Dirk B. Walther
1Department of Psychology, University of Toronto, Toronto, Ontario M5S 3G3, Canada
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Amy S. Finn
1Department of Psychology, University of Toronto, Toronto, Ontario M5S 3G3, Canada
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Abstract

A defining feature of children's cognition is the especially slow development of their attention. Despite a rich behavioral literature characterizing the development of attention, little is known about how developing attentional abilities modulate neural representations in children. This information is critical to understanding how attentional development shapes the way children process information. One possibility is that attention might be less likely to shape neural representations in children as compared with adults. In particular, representations of attended items may be less likely to be enhanced relative to unattended items. To investigate this possibility, we measured brain activity using fMRI while children (seven to nine years; male and female) and adults (21–31 years; male and female) performed a one-back task in which they were directed to attend to either motion direction or an object in a display where both were present. We used multivoxel pattern analysis to compare decoding accuracy of attended and unattended information. Consistent with attentional enhancement, we found higher decoding accuracy for task-relevant information (i.e., objects in the object-attended condition) than for task-irrelevant information (i.e., motion in the object-attended condition) in adults' visual cortices. However, in children's visual cortices, both task-relevant and task-irrelevant information were decoded equally well. What is more, whole-brain analysis showed that the children represented task-irrelevant information more than adults in multiple regions across the brain, including the prefrontal cortex. These findings show that (1) attention does not modulate neural representations in the child visual cortex, and (2) developing brains can, and do, represent more information than mature brains.

SIGNIFICANCE STATEMENT Children have been shown to struggle with maintaining their attention to specific information, and at the same time, can show better learning of “distractors.” While these are critical properties of childhood, their underlying neural mechanisms are unknown. To fill in this critical knowledge gap, we explored how attention shapes what is represented in children's and adults' brains using fMRI while both were asked to focus on just one of two things (objects and motion). We found that unlike adults, who prioritize the information they were asked to focus on, children represent both what they were asked to prioritize and what they were asked to ignore. This shows that attention has a fundamentally different impact on children's neural representations.

  • attention
  • cognitive neuroscience
  • development
  • fMRI

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The Journal of Neuroscience: 43 (21)
Journal of Neuroscience
Vol. 43, Issue 21
24 May 2023
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Neither Enhanced Nor Lost: The Unique Role of Attention in Children's Neural Representations
Yaelan Jung, Tess Allegra Forest, Dirk B. Walther, Amy S. Finn
Journal of Neuroscience 24 May 2023, 43 (21) 3849-3859; DOI: 10.1523/JNEUROSCI.0159-23.2023

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Neither Enhanced Nor Lost: The Unique Role of Attention in Children's Neural Representations
Yaelan Jung, Tess Allegra Forest, Dirk B. Walther, Amy S. Finn
Journal of Neuroscience 24 May 2023, 43 (21) 3849-3859; DOI: 10.1523/JNEUROSCI.0159-23.2023
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Keywords

  • attention
  • cognitive neuroscience
  • development
  • fMRI

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