Children with Asperger syndrome display similar characteristics to those of autistic children. They have problems with communication, social relationships and making imaginative responses. However, they are often more articulate than autistic children and may be keen to speak at great length on their own personal topics of interest. Children with Asperger syndrome may find any large group of people, including a room full of children, daunting and even threatening. They don't like to be the focus of others' attention and respond negatively, sometimes aggressively, to any situation they don't understand. When challenged they may seek to hide in a small, enclosed space such as a cupboard or a toilet cubicle. Asperger syndrome requires a multi-professional diagnosis.