A rising up in the number of children suffered with autism in last decades is largely on account of doctors involving kids with less acute behavioural symptoms, an international research has found. The research found the 20 times grow about the last 30 years was not due to there have been more children being born with the disorder. The lead author of the research, described at the time that researchers knew there was a significant increment of autism over the years, they did not realize why, and he inform that what they really found is that the major grow in these numbers were due to children who had milder autistic signs. The research supplied the first proof internationally of a decreasing over time in the behavioural seriousness of individuals diagnosed with autistic disorder, in time the lead author of the research inform that the research results did not necessarily propose a jostle to discover a clinical explanation for children’s behavioural problem. The old idea about the autism around two or three decades was the children who had mental disabilities and had in fact extreme problems learning to talk, but now know that autism presents all over a spectrum, and so there can be kids who are completely significantly mentally disabled and also individuals without any mental disability.