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Published on: April 12, 2018
Lexico-semantic processing in children with specific language impairment: the overactivation hypothesis
Fabrizio Pizzioli1, Marie-Anne Schelstraete
1Unité Cognition et Dévelopment, Université catholique de Louvain, Belgium. fabrizio.pizzioli@uclouvain.be
Journal of Communication Disorders
|August 27, 2010
Summary
Children with specific language impairment (SLI) show an overactive lexico-semantic network. This study used a pair-primed paradigm (PPP) to demonstrate larger priming effects in children with SLI, supporting this hypothesis.
Area of Science:
- Psycholinguistics
- Developmental Psychology
- Neuroscience
Background:
- Specific Language Impairment (SLI) is characterized by difficulties in language acquisition.
- The lexico-semantic network's function in SLI is not fully understood.
- Previous research suggests potential atypicalities in cognitive domains during development.
Purpose of the Study:
- To investigate the lexico-semantic network's activation in children with SLI.
- To utilize the pair-primed paradigm (PPP) to examine online semantic spreading.
- To determine if children with SLI exhibit an overactivated lexico-semantic network.
Main Methods:
- Employed an auditory pair-primed paradigm (PPP).
- Participants performed lexical decisions on noun pairs.
- Semantic relatedness between word pairs was manipulated.
Main Results:
- Children with SLI showed accuracy comparable to age-matched peers.
- A larger priming effect was observed in children with SLI.
- This effect was evident in both reaction time and accuracy measures.
Conclusions:
- Preliminary findings support the hypothesis of an overactivated lexico-semantic network in SLI.
- Developmental trajectories in SLI may involve subtle, widespread abnormalities.
- The PPP is a valuable tool for studying semantic network dynamics in developmental disorders.
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