False belief and sentence complement performance in children with specific language impairment.

Area of Science:

• Developmental Psychology
• Linguistics
• Cognitive Science

Background:

• Children with specific language impairment (SLI) exhibit language abilities disproportionate to other cognitive skills.
• Investigating the language-theory of mind relationship is crucial, with differing views on whether language development facilitates theory of mind (ToM) development.
• Specifically, mastery of sentence complement structures is hypothesized to be necessary for false belief understanding.

Purpose of the Study:

• To determine if children with SLI can succeed on false belief tasks with reduced linguistic complexity.
• To investigate whether performance on sentence complement structures predicts performance on false belief tasks.

Main Methods:

• A false belief task with four linguistic complexity conditions and a sentence complementation understanding test were administered.
• Participants included 15 children with SLI, 15 age-matched controls, and 15 language comprehension-matched controls.
• Non-parametric tests, partial correlation, and log-linear analysis were used to analyze group and condition differences and relationships.

Main Results:

• Children with SLI performed comparably to age-matched peers on low-linguistic-demand false belief tasks.
• Children with SLI showed poorer performance on understanding sentence complements compared to age-matched peers.
• Sentence complement performance correlated with false belief performance across all children, particularly in less linguistically demanding conditions.

Conclusions:

• Children with SLI can achieve age-appropriate performance on less linguistically demanding false belief tasks.
• Mastery of sentence complement structures is a significant predictor of false belief understanding in children.
• This suggests a facilitative role for specific linguistic skills in the development of theory of mind.