Research shows that early diagnosis of and interventions for autism are more likely to have major long-term positive effects on symptoms and later skills. Autism spectrum disorder (ASD) can be diagnosed in children before they are 2 years of age, even from 18 months. In this period, a young child's brain is still forming, meaning it is more "plastic" or changeable than at older ages, therefore treatments have a better chance of being effective in the longer term. Early interventions not only give children the best start possible, but also the best chance of developing to their full potential. The sooner a child gets help, the greater the chance for learning and progress, even when not diagnosed yet, but seriously suspected. It can also prevent frustration—so common in children with communication difficulties—from turning into more difficult behaviours.