Full Breakdown
Understanding Deception in Infants: A Study on Early Lying Behaviors
3/16/2026, 7:05:56 PM
Core Findings on Infant Deception
A recent study led by the University of Bristol reveals that infants can grasp the concept of deception even before their first birthday. The research indicates that approximately 25% of children begin to understand deceptive behaviors by 10 months, with this figure increasing to 50% by 17 months. By the age of three, children exhibit more sophisticated and frequent deceptive behaviors, becoming adept at various forms of lying.
The study involved insights from over 750 parents of children aged up to 47 months from the UK, US, Canada, and Australia. Parents reported observing 16 distinct types of deceptive behaviors, including exaggeration, denial, feigning deafness, and hiding objects. Notably, the earliest instance of deception was reported in an eight-month-old infant.
Types of Deceptive Behaviors
The study identified several common deceptive tactics employed by toddlers. These include:
- Pretending not to hear: Children may ignore requests, such as when asked to tidy up.
- Hiding items: To prevent sharing, toddlers often conceal toys or snacks.
- Denial: For instance, a child might eat chocolate but deny it when questioned.
- Excuses: Children may claim they need to use the toilet to avoid chores.
- Fabrication: Some children invent stories or omit details to mislead adults.
As children grow, their deceptive strategies evolve, incorporating more complex language and social understanding. By age three, they may use distraction techniques, such as diverting attention to avoid consequences.
Insights from Researchers
Elena Hoicka, the study's lead author and a professor of education at the University of Bristol, expressed fascination at how children's understanding of deception develops from a young age. She noted, "It was fascinating to uncover how children’s understanding and usage of deception evolves... so they become quite adept and cunning ‘little liars’."
Jennifer Saul, a co-author and philosophy professor at the University of Waterloo, emphasized the complexity of deception in early childhood, stating, "Philosophers have long reflected on the morality of human deception... This study shows just how much complexity gets overlooked by that focus."
Implications for Parents and Educators
The findings provide valuable insights for parents and educators, reassuring them that deception is a normal part of toddler development. Hoicka encourages parents to understand the types of deception their children may exhibit at different ages, allowing for better communication and strategies to address deceitful behaviors.
Verbatim Quotes
- “It was fascinating to uncover how children’s understanding and usage of deception evolves from a surprisingly young age and builds in their first years so they become quite adept and cunning ‘little liars’.” — Elena Hoicka, Professor of Education, University of Bristol
- “Firstly, parents can be reassured deception is entirely normal in toddler development.” — Elena Hoicka, Professor of Education, University of Bristol
- “Philosophers have long reflected on the morality of human deception, but always focused on adults deceiving one another. This study shows just how much complexity gets overlooked by that focus.” — Jennifer Saul, Professor of Philosophy, University of Waterloo
Conclusion
This research highlights the early emergence of deceptive behaviors in infants, providing a framework for understanding how these skills develop. By recognizing and addressing these behaviors, parents and educators can foster a supportive environment that encourages honesty and communication as children grow.
