Using humour can help toddlers learn new tasks, a team of French scientists has discovered.
Building on the knowledge that making older children laugh can enhance many aspects of cognition, researchers designed an experiment to see whether using humour could also have an effect on the ability of infants to learn.
Each of the 18-month-olds selected to participate in the final part of the study observed an adult using a tool to grab an out-of-reach toy.
In one group the adult simply played with the toy after retrieving it; but in the other group, the adult threw the toy immediately on the floor, which made half the children in that group laugh.
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Why laughter seems to be related to the toddlers' ability to learn isn't entirely clear, but researchers put forward two possible explanations. The first relates to temperament.
"In this case, it is not humour per se that may have facilitated learning," the researchers suggest, "but [that] temperamentally 'smiley' babies were more likely to engage with the environment and therefore to attempt and succeed at the task."
The second explanation the researchers put forward relates to brain chemistry. It is well known that positive emotions, like laughter or engaging well with an experimenter, can increase dopamine levels in the brain, which in turn has a positive effect on learning.
"Thus, the effect observed here might be a general effect due to positive emotion and not to humour or laughter per se," researchers said.