Neural entrainment to speech and nonspeech in dyslexia: Conceptual replication and extension of previous investigations

Whether phonological deficits in developmental dyslexia are associated with impaired neural sampling of auditory information is still under debate. Previous findings suggested that dyslexic participants showed atypical entrainment to slow and/or fast temporal modulations speech, which might affect prosodic/syllabic and phonemic processing respectively. However, the large methodological variations across these studies do not allow us draw clear conclusions on nature deficit dyslexia. Using magnetoencephalography, we measured nonspeech speech both groups. We first aimed conceptually replicate previous dyslexia, using same measurement methods as studies, also new (cross-correlation analyses) better characterize synchronization between stimulus brain response. failed observe any significant group differences had previously been reported delta, theta gamma frequency bands, whether or stimuli. when analyzing amplitude cross-correlations noise stimuli responses, found control larger responses than delta range right hemisphere left hemisphere. Overall, our results weakly consistent hypothesis individuals show an modulations. Our attempt at replicating published highlights multiple weaknesses this research area, particularly low statistical power due small sample size, lack standards inducing considerable heterogeneity analysis studies.