Canonical linking rules: forward versus reverse linking in normally developing and specifically language-impaired...

Area of Science:

• Linguistics
• Developmental Psychology
• Neurolinguistics

Background:

• Mapping thematic roles to syntactic functions is crucial for language acquisition.
• Forward linking (semantics to syntax) and reverse linking (syntax to semantics) represent distinct cognitive processes.
• Specifically language-impaired (SLI) children often exhibit unique challenges in language processing.

Purpose of the Study:

• To investigate the differences between forward and reverse linking in children with and without SLI.
• To test the hypothesis that reverse linking requires more detailed syntactic specification than forward linking.
• To explore the underlying linguistic mechanisms, such as government and locality, that may explain observed deficits.

Main Methods:

• Three experiments were conducted: forward linking (verb meaning to sentence production), comprehension (sentence to action), and reverse linking (sentence to action with thematic role assignment).
• Participants included six specifically language-impaired children and 17 age-matched, normally developing children.
• Performance was analyzed for group and individual differences across the linking tasks.

Main Results:

• No significant differences were found between SLI and control groups in forward linking (Experiment 1) or comprehension (Experiment 2).
• A significant difference emerged in reverse linking (Experiment 3), with SLI children performing significantly worse than controls.
• Normally developing children demonstrated proficiency in both forward and reverse linking.

Conclusions:

• The findings support the hypothesis that reverse linking imposes greater demands on syntactic representation compared to forward linking.
• SLI children's difficulties in reverse linking may stem from deficits in syntactic processing, specifically in areas like government or locality, affecting c-selection.
• This study highlights specific challenges in syntactic-semantic mapping for children with SLI, contributing to our understanding of language development and disorders.