dc.description.abstract | Developmental dyslexia is a disorder that manifests itself by severe problems with reading and
writing. It has been hypothesized that early speech perception is impaired in individuals with
dyslexia. It has also been found that children with a familial risk of dyslexia show delays in their
early language development, which might be precursors of dyslexia. In this study, the language
development at toddler age of children with and without a familial risk of dyslexia is
investigated, as well as the possibility of a relationship between early speech discrimination
abilities at infant age and language development at toddler age. 48 Dutch monolingual children
with and without a familial risk of dyslexia at the ages of 3;6 tot 4;6 were tested on receptive
vocabulary size, verbal short‐term memory, morpho‐syntactic production, word retrieval speed
and cognitive control of selective attention. These children had participated in a speech sound
discrimination experiment (De Klerk et al., in prep) at the ages of 6 to 8 months. They were
tested on their abilities to discriminate between alternating and non‐alternating trials of native
and non‐native sound contrasts. No group differences in performance on the tasks at toddler age
were found. In de speech discrimination experiment, the sample of infants of this study showed
sensitivity to the native sound contrast at the ages of 6 and 8 months. They did not show
sensitivity to the non‐native sound contrast at the ages of 6 and 8 months. A negative correlation
was found between looking time difference on the native sound contrast at the age of 6 months
and the performance on the PPVT, which measures receptive vocabulary size. A positive
correlation was found between looking time difference on the non‐native sound contrast at the
age of 8 months and the performance on the non‐word repetition task. No other correlations
between performance at infant age and performance at toddler age were found. This resulted in
the conclusion that, for this sample of children, there is no reliable evidence for a relationship
between early speech perception and later language development. | |