The Handbook of Psycholinguistic and Cognitive Processes by Guendouzi Jackie;Loncke Filip;Williams Mandy J.;

Author:Guendouzi, Jackie;Loncke, Filip;Williams, Mandy J.;
Language: eng
Format: epub
Publisher: Taylor & Francis Group

20

Grammatical-Specific Language Impairment: A Window Onto Domain Specificity

Heather van der Lely and Chloë Marshall

Introduction

There has been much debate as to which aspects of language are specific to language rather than shared with other aspects of cognition, and which aspects of language are specific to humans rather than shared with other groups of animals (Hauser, 2001; Hauser, Chomsky, & Fitch, 2002; Pinker & Jackendoff, 2005). In addition, there continues to be much discussion about how this specialized language system is represented and develops in the brain. New insight into this debate comes from studying people with a developmental language disorder, Specific Language Impairment (SLI), and particularly a subtype of this disorder known as Grammatical (G)-SLI. Such insight is bidirectional: our growing understanding of language and brain-systems enhances and directs our line of enquiry into SLI, furthering our knowledge of the underlying nature of both typical and atypical language development. In turn, this informs our enquiries about language and brain systems.

In this context, our chapter reviews the findings from G-SLI, and aims to contribute to our understanding both of specialized cognitive systems, specifically language, and of the nature of typical and atypical language acquisition. We argue that our data provide evidence that certain aspects of grammar are domain-specific and can be selectively impaired.

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