The development of mental terms: pragmatics or semantics?

Area of Science:

• Cognitive Development
• Psycholinguistics
• Theory of Mind

Background:

• Children's understanding of mental state terms is crucial for social cognition.
• Distinguishing between terms like 'know,' 'think,' and 'sure' reflects developing metacognitive abilities.
• Previous research has explored children's grasp of belief and knowledge, but the nuances of certainty are less understood.

Purpose of the Study:

• To investigate how children between three and six years of age differentiate the mental terms 'know,' 'think,' and 'sure.'
• To determine if children perceive these terms as indicating varying degrees of certainty.
• To examine the developmental trajectory of this understanding.

Main Methods:

• An experiment was conducted with 60 children aged 3-6 years.
• Children were tasked with locating a hidden object based on clues using contrasting mental terms ('know,' 'think,' 'sure').
• Performance was analyzed based on age groups and the specific mental terms used in the clues.

Main Results:

• A significant age-related improvement was observed in distinguishing between 'know'-'think' and 'sure'-'think' contrasts.
• By 4-5 years of age, children treated 'think' as a less reliable indicator of object location compared to 'know' and 'sure.'
• No significant age-related change was found for the 'know'-'sure' contrast.

Conclusions:

• Children aged 4-5 years recognize that mental terms convey different degrees of certainty.
• This understanding of certainty levels associated with mental terms is likely not solely based on the factive properties of the words.
• The findings contribute to understanding the development of children's metacognitive and linguistic abilities regarding certainty.