A new study initiated by the researchers from the University of Oregon's school psychology program related to the effect of autism on families having autistic children suggests that elementary-school aged older siblings of autistic children tend to develop hyperactive problems during their childhood.

The revelation specifically points on the older siblings of such toddlers are reported to suffer from communication, social and behavior related abnormalities, getting vulnerable to Attention Deficit Hyperactive Disorder (ADHD).

"However, it has been shown that around 30 percent of siblings of autistic children have some associated difficulties in behavior, learning or development." noted McIntyre, an affiliate of the UO's Center for Excellence and Developmental Disabilities, Education, Research and Service.

The study involved 20 New York-based families having a preschooler autistic child and older elementary-school going siblings.

During the study, the experimental families were compared with a control group of 23 families with no autistic child.

The study revealed to discover no significant contrast in the social skills of the children with autistic siblings as compared to those in the control group.