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The Is A Disorder Diagnosed When Oral Language

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SLI is a disorder diagnosed when oral language lags behind other areas of development for no apparent reason (Bishop & Snowling, 2004). Many studies report that SLI affects a relatively large percentage of the child population, around 5%- 10%, (McArthur et al., 2000). Furthermore, McArthur et al. (2000) showed that more than 50% of children with dyslexia also meet the criteria for SLI (see also Marshall, Harcourt-Brown, Ramus & Van der Lely, 2009 and McArthur & Hogben, 2001). Bishop and Snowling (2004) claim that diagnostic criteria for SLI are vague. This is
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because children with SLI display significant difficulties with one or more linguistic domains, such as phonology, syntax, semantics and pragmatics. In fact, the defining criterion states that a child has SLI if their difficulties cannot be explained by deficits in other aspects of cognition that are linked to language acquisition, such as intelligence, hearing, oral-motor skills and language exposure (Dollaghan, 2008), but does not specifically define any subfield of linguistics as crucial for the discrimination.
5. 4. 2 SLI and morphology
Friedmann & Novogrodsky (2006) present a detailed discussion of variability in SLI. The authors distinguish between phonological-SLI, syntactic-SLI, semantic- SLI and pragmatic-SLI. In their study, the authors tested children with SLI using tapping tasks in dissociated form on syntax, semantics, phonology or pragmatics. They observed that children’s difficulties can be

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