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The relation between working memory capacity and auditory lateralization in children with auditory processing

Abdollah Moossavi1, Saiedeh Mehrkian2, Yones Lotfi2

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Working memory capacity significantly impacts sound lateralization in children with auditory processing disorders (APD). Lower working memory correlated with more errors in sound localization, especially with specific noise stimuli.

Keywords:
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Area of Science:

  • Neuroscience
  • Audiology
  • Developmental Psychology

Background:

  • Auditory processing disorder (APD) presents as difficulties in speech perception, particularly in noise, and is linked to learning challenges.
  • Current understanding of APD's nature, assessment, and management lacks consensus.
  • The interplay between cognitive abilities and auditory processing in APD is not fully understood.

Purpose of the Study:

  • To investigate the influence of working memory capacity on sound lateralization abilities in children with APD.
  • To explore the relationship between "auditory cognition" and APD in a pediatric population.

Main Methods:

  • A cross-sectional study comparing 17 children with APD and 20 typically developing children (ages 9-11).
  • Sound lateralization assessed using inter-aural time (ITD) and intensity (IID) differences with high-pass and low-pass noise stimuli.
  • Working memory capacity evaluated via non-word repetition and digit span tasks; linear regression analyzed associations.

Main Results:

  • Children with APD demonstrated lower performance in both lateralization and working memory tasks compared to controls.
  • A significant negative correlation was found between working memory capacity and ITD errors, particularly with high-pass noise in the APD group.
  • No significant correlation was observed between working memory capacity and IID errors.

Conclusions:

  • Working memory capacity plays a crucial role in auditory lateralization performance.
  • The degree of working memory's influence on auditory processing is dependent on the specific auditory task and stimulus characteristics.