 The behavior of people with autism may differ cross-culturally, and the capacity to do autism research can be impeded because of these differences.A further challenge is that caregivers and professionals must have knowledge that certain symptoms are associated with autism, and they must perceive these symptoms as problematic.In a certain culture, for example, if language delays are not seen as uncommon until a child is four or five, a professional may not see the delay as symptomatic of autism.