Is poor frequency modulation detection linked to literacy problems? A comparison of speciWc reading disability and mild to moderate sensorineural hearing loss  

Oleh:

Halliday, L.F. ; Bishop, D.V.M.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 97 no. 2 (2006), page 200-213.
Topik: SpeciWc reading disability; Sensorineural hearing loss; Frequency modulation detection; Literacy
Fulltext: 97_02_Halliday.pdf (357.65KB)

Isi artikel

SpeciWc reading disability (SRD) is now widely recognised as often being caused by phonological processing problems, aVecting analysis of spoken as well as written language. According to one theoretical account, these phonological problems are due to low-level problems in auditory perception of dynamic acoustic cues. Evidence for this has come from studies showing poor discrimination of frequencymodulated from unmodulated tones. We measured frequency modulation detection limens (FMDLs) in 16 children with speciWc reading disability (SRD group), 16 children with mild to moderate hearing loss (SNH group) and 16 age-matched controls (CA group) aged 8–14. To obtain information about possible mechanisms used in frequency modulation detection, FMDLs were measured at modulation rates of 2 and 20 Hz, both in the absence and the presence of amplitude modulation, intended to force listeners to rely, if possible, upon phaselocking cues. Although both the SNH and SRD groups showed a trend for elevated FMDLs at both 2 and 20Hz, these diVerences reached statistical signiWcance for the SNH group alone. However, the SNH group had no evidence of literacy impairments. This study thus shows that impairments in perceiving dynamically modulated auditory stimuli do not necessarily lead to diYculty in learning to read.

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