A new research has found that toddlers especially those who have siblings, understand how the sounds they make affect people around them.
The research led by Georgia State University examined 48 children, ages 2 to 3-years-old and gave them a chance to play with two toys, a quiet toy and a loud toy and asked them either to wake up a baby or let the baby sleep.
The research showed that children, particularly those with siblings, understand the behavioral and psychological effects of different types of sound as the one who were told to wake the baby produced louder sounds, while children who were told not to wake the baby produced quieter sounds.
Dr. Rebecca Williamson, assistant professor of psychology at Georgia State said that young children tried to wake the baby with loud sounds and played quietly to let the baby sleep.
The research findings are published in the Journal of Cognition and Development.
