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Toddlers, especially those with siblings, have higher EQs than previously believed, according to a new study.

The latest study, performed by researchers at Georgia State University and University of Washington, revealed that children between aged two to three understand how the sounds they make influence others.

The latest study involved 48 toddlers who played with two different toys: a quiet toy and a loud toy. Researchers then introduced a doll and gave the children one of two tasks- to wake up the doll or let it sleep.

After some time, children were given the toys again but were not given instructions on how to interact with the doll.

The study revealed that the children understood the behavioral and psychological effects of different types of sound. This was especially true for those with siblings.

"We were excited to see that young children tried to wake the baby with loud sounds. They also played quietly to let the baby sleep," researcher Dr. Rebecca Williamson, assistant professor of psychology at Georgia State, said in a news release.

The findings were published in the Journal of Cognition and Development.