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We investigated auditory temporal processing in children with amblyaudia (AMB), a subtype of auditory processing disorder (APD),  via  cortical neural entrainment. Evoked responses were recorded to click-trains at slow vs. fast (8.5 vs. 14.9/s) rates in  n  = 14 children with AMB and  n  = 11 age-matched controls. Source and time–frequency analyses (TFA) decomposed EEGs into oscillations (reflecting neural entrainment) stemming from bilateral auditory cortex. Phase-locking strength in AMB depended critically on the speed of auditory stimuli. In contrast to age-matched peers, AMB responses were largely insensitive to rate manipulations. This rate resistance occurred regardless of the ear of presentation and in both cortical hemispheres. Children with AMB show less rate-related changes in auditory cortical entrainment. In addition to reduced capacity to integrate information between the ears, we identify more rigid tagging of external auditory stimuli. Our neurophysiological findings may account for domain-general temporal processing deficits commonly observed in AMB and related APDs behaviourally. More broadly, our findings may inform communication strategies and future rehabilitation programmes; increasing the rate of stimuli above a normal (slow) speech rate is likely to make stimulus processing more challenging for individuals with AMB/APD.

Children with amblyaudia show less flexibility in auditory cortical entrainment to periodic non-speech sounds