Humor helps toddlers learn new tasks, according to a recent study.

Researcher Rana Esseily and her colleagues found that toddlers who were humored were more likely to repeat the action that caused them to laugh.

For the study, the researchers designed an experiment to see whether using humor could also have an effect on the ability of infants to learn. This study builds on the knowledge that making older children laugh can enhance many aspects of cognition,

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.

They found that children who laughed at the antics of the adults were able to repeat the action themselves more successfully than those who didn't laugh, as well as those who were included in the 'humorless' control group.

Why laughter seems to be related to the toddlers' ability to learn isn't entirely clear, but Esseily and her team put forward two possible explanations. The first relates to temperament.

"In this case, it is not humor per se that may have facilitated learning, but [that] temperamentally 'smiley' babies were more likely to engage with the environment and therefore to attempt and succeed at the task," researchers said in the study.

It could also be the case that "laughing babies" might have higher social skills or cognitive capacities, allowing them to interact more easily with others and making them more amenable to mimicking the actions of others.

The second explanation the authors 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 humor or laughter per se," they note.

Investigators say more research needs to be done into the effect of humor on learning.

The findings are detailed in the journal Cognition and Emotion.