Autism spectrum Disorders (ASD) are, without doubt, one of the nosological groups that cause the greatest suffering in childhood both for those who are affected with this condition and for those who accompany them (parents, family, caregivers, etc.). ASD is a group of chronic conditions with onset before the age of three. However, it is believed that in many cases affectation is present at birth or even in the foetal period. Although some children have signs in the first few months of life, others do not become manifest until 24 months of age. In fact, development sometimes appears to be normal until the children are aged 18-24 months, when they stop acquiring new skills and lose those they have already acquired. Many studies have shown that people with ASD interact, communicate, learn and behave differently from others. Sometimes, however, there appears to be no difference, and sometimes children with ASD show both a ‘high level’ of functioning in specific areas and a constant need for support in all areas of functioning throughout their lives. Moreover, some people who do not suffer from ASD may also present several symptoms of the disorder.