Tests are also made with children who have autistic brothers or sisters. Thus a comparison can be made between an autistic child and his siblings provided that they have one and the same living conditions and are exposed to the same environmental conditions and stimuli. Unfortunately the chance for a child with an autistic brother or sister to become autistic himself is higher and this fact is used by researchers. What they want to do is to have a control group of children with autistic siblings which to examine from the moment they were born. Researchers hope that thus they can gather a lot of useful information.

In spite of all the above mentioned efforts, there is a long way to be passed in order to find a cure. This main aim can be only reached with doing much more researches that of course will require much bigger funding.