Babies Learn to Deceive Before They Can Talk, Groundbreaking Study Reveals
Infants are capable of mastering the art of deception even before their first birthday, according to a new international study. Researchers have discovered that some babies employ sneaky tactics such as exaggeration, denial, feigning deafness, or hiding objects by the time they reach toddlerhood. The University of Bristol-led research indicates that about a quarter of children begin to understand deception by 10 months old, a figure that rises to half by 17 months.
Evolution of Deceptive Skills in Early Childhood
By the age of three, children become notably more proficient, creative, and frequent in their fabrications, according to the comprehensive findings. The study gathered insights from parents of over 750 children, aged up to 47 months, across the UK, US, Australia, and Canada, who reported on their child's deceptive development. Overall, 130 parents detailed 16 distinct types of deceptive behaviour exhibited by their children before 47 months.
The earliest instance of deception was observed in an eight-month-old baby, according to one parent's report. Professor Elena Hoicka, the study's lead author from Bristol University's education department, stated: "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'.
Common Deceptive Tactics Employed by Young Children
The 'sneaky habits' documented by parents included:
- Pretending not to hear to avoid tasks
- Hiding items to prevent sharing
- Outright denial of actions
- Engaging in forbidden activities in secret
- Using excuses and exaggeration
- Feigning ignorance or misunderstanding
Professor Hoicka explained: "From two years, deception tends to be action-based, or require only basic spoken responses, like pretending not to hear their parent say 'time to tidy up', hiding things from others, or denial – such as eating chocolate but shaking head to say 'no' when asked if they ate chocolate."
More sophisticated methods observed included fabricating stories, pretending not to see something they shouldn't be looking at, withholding information, and omitting details. Children also demonstrated advanced techniques like restructuring responses by offering partial truths, being deliberately vague, and using distraction as a tool.
Implications for Parents and Educators
Researchers believe the study offers valuable insights for parents and educators, shedding light on how children might develop more advanced deceptive behaviours as they grow. Professor Hoicka reassured parents that "deception is entirely normal in toddler development." She added: "They can also look at our findings to know which types of deception to expect by age, so they can better understand and communicate with their children in order to stay one step ahead of their deceit."
Professor Jennifer Saul, a philosophy professor at the University of Waterloo and study co-author, highlighted the broader implications: "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."
The research provides unprecedented insight into the early development of social cognition and communication skills, revealing that deceptive behaviour emerges much earlier in human development than previously understood.



