The age at which children begin to exhibit deceptive behaviour

Health & FitnessFamily & Parenting
26 Mar 2026 • 8:09 PM MYT
The Independent
The Independent

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  • A new study has explored the age at which children begin to exhibit deceptive behaviour, with some parents reporting recognition of the concept as early as eight months old.
  • Published in the Cognitive Development journal, the research involved surveying parents of more than 750 children aged up to 47 months across the UK, US, Canada, and Australia.
  • Findings indicate that about a quarter of children understand deception by 10 months, and half by 16 months, becoming more adept fibbers by the age of three.
  • Elena Hoicka, the study's lead author from the University of Bristol, highlighted how children's understanding and use of deception evolves significantly in their early years.
  • Researchers identified 16 types of deception, noting that younger children's deceit is often action-based, while older children employ more complex tactics like exaggeration, fabrication, or withholding information.

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