Print-Speech Convergence Predicts Future Reading Outcomes in Early Readers.

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Science

Background:

• Skilled reading acquisition necessitates integrating printed language processing with existing spoken language networks.
• Understanding the neural underpinnings of this integration is crucial for identifying early predictors of reading success.

Purpose of the Study:

• To investigate the longitudinal relationship between print-speech coactivation within the reading network and subsequent reading achievement in children.
• To determine if this coactivation predicts reading outcomes beyond modality-specific brain activity.

Main Methods:

• A longitudinal study utilizing functional magnetic resonance imaging (fMRI) to assess brain activity in beginning readers.
• Examined convergent activation (coactivation) for printed and spoken language in key reading network regions.
• Statistical analyses controlled for initial reading performance and modality-specific effects.

Main Results:

• Print-speech coactivation across the left-hemisphere reading network significantly predicted reading achievement two years later.
• Coactivation effects explained variance in later reading performance, independent of initial reading skills.
• Significant coactivation was observed in the bilateral inferior frontal gyrus (IFG), left inferior parietal cortex, and fusiform gyrus.
• Differential effects of IFG coactivation were noted: left IFG predicted better outcomes, while right IFG predicted poorer outcomes.

Conclusions:

• Print-speech convergence within the reading network is central to developing efficient reading circuitry in children.
• Early neural coactivation patterns offer valuable insights into predicting future reading abilities.
• The distinct roles of left and right IFG in coactivation highlight the complexity of reading network development.