The prevalence and developmental course of auditory processing differences in autistic children

Area of Science:

• Neurodevelopmental disorders
• Auditory processing
• Child psychology

Background:

• Auditory processing differences are frequently observed in autistic individuals, encompassing sound hypersensitivity, hyposensitivity, and difficulties in noisy environments.
• The developmental progression and functional consequences of these auditory differences in autism remain incompletely understood.
• Longitudinal data is crucial for elucidating the trajectory and impact of auditory processing variations in autistic children.

Purpose of the Study:

• To investigate the prevalence and developmental course of auditory processing differences in autistic children from early childhood to age 9.
• To examine the association between auditory processing differences and adaptive and disruptive behaviors.
• To determine if early auditory processing differences predict later behavioral outcomes.

Main Methods:

• A longitudinal study design was employed, tracking autistic children at ages 3, 6, and 9 years.
• Auditory processing differences were assessed using the Short Sensory Profile, a caregiver-reported questionnaire.
• Caregiver questionnaires also measured adaptive behaviors and disruptive/concerning behaviors.

Main Results:

• Auditory processing differences were reported in over 70% of autistic children across all measured timepoints.
• These differences remained prevalent up to age 9 and were associated with increased disruptive behaviors and impaired adaptive functioning.
• Auditory processing differences at age 3 significantly predicted disruptive behaviors and adaptive difficulties at age 9.

Conclusions:

• Auditory processing differences are a persistent characteristic in a majority of autistic children.
• These auditory challenges are linked to significant behavioral and adaptive impairments throughout childhood.
• Findings support the inclusion of auditory processing assessments in routine clinical evaluations and the development of targeted interventions for autistic children.