Semantic representation and naming in children with specific language impairment

Area of Science:

• Developmental Psychology
• Linguistics
• Speech-Language Pathology

Background:

• Specific Language Impairment (SLI) often manifests as early lexical deficits, impacting word retrieval during speech and naming tasks.
• Comparing picture naming and drawing abilities is crucial for understanding lexical access difficulties in children with SLI.

Purpose of the Study:

• To compare naming, drawing, and definition performance between children with SLI and those with normal language development (NLD).
• To investigate the quality of semantic representations in the lexicon of children with SLI.

Main Methods:

• Two groups participated: 40 children with NLD (Control Group) and 20 children aged 5-7 with SLI (Research Group).
• Tasks included picture naming (analyzing semantic and phonological errors), picture drawing, and object definitions.
• Analysis focused on error types in naming and correctness/semantic errors in drawing and definition tasks.

Main Results:

• Children with SLI made significantly more semantic errors during picture naming compared to the control group.
• Definitions provided by children with SLI were simpler and less complete, even for correctly named items.
• Drawings of accurately named objects were of higher quality than those of incorrectly named objects.

Conclusions:

• The study successfully differentiated children with SLI based on the severity of their lexical deficits.
• Findings offer insights into the underlying reasons for naming task difficulties in children with SLI, particularly concerning semantic representation.