Children's difficulty with true belief tasks: Competence deficit or performance problem?

Area of Science:

• Developmental psychology
• Cognitive science
• Theory of Mind research

Background:

• The standard model of explicit theory of mind (ToM) development posits that children, around age 4, master false belief (FB) tasks.
• Recent studies challenge this by showing younger children fail true belief (TB) tasks after mastering FB tasks, suggesting simpler strategies for FB.
• This raises questions about the validity of the standard ToM development picture.

Purpose of the Study:

• To comprehensively investigate the development of FB and TB task performance.
• To test competing competence versus performance limitation accounts of TB task difficulties.
• To determine if TB task failures are due to conceptual limitations or performance factors.

Main Methods:

• Studies 1 and 2: Assessed performance on novel TB tasks across a wide age range, analyzing U-shaped performance curves and correlations with FB performance.
• Study 3: Directly manipulated pragmatic and performance factors in TB tasks to test performance limitation hypotheses.
• Utilized various TB task types, including those not predicted to be difficult by competence accounts.

Main Results:

• Studies 1 and 2 revealed U-shaped performance curves in TB tasks, with competence in children under 3 and over 10, and failure in between.
• Strong negative correlations were observed between TB and FB task performance.
• Study 3 demonstrated that removing performance factors eliminated TB task failures and the negative TB-FB correlations.

Conclusions:

• Previous findings of TB task failures in children are likely false negatives due to performance limitations.
• The results strongly support performance limitation accounts over competence accounts.
• The standard picture of explicit theory of mind development, where children master FB tasks around age 4, is corroborated.