Metaphorical and Associative Thinking in Healthy Children and in Children with Asperger's Syndrome at Different Ages

Abstract

The study of healthy children and patients with childhood autism (Asperger's syndrome) showed that metaphorical thinking is normally efficient at the age of 7–8 years and that autistic children have an impaired ability to understand metaphors and idioms widely used in verbal communication. The deficit of metaphorical thinking in autism is thought to be due to a decreased activity of the right hemisphere. In a study of associative thinking, healthy schoolchildren displayed a high degree of association between words describing sensual objects and autistic patients displayed an impairment of objective associations and a predominance of proper names, which is indicative of the left-hemispheric type of association. The impairment of the speech and mental activity (metaphorical and associative thinking) testified to changes in the interhemispheric interaction in autistic children, which is likely to show up in a decreased functional activity of the right hemisphere and an increased activity of the left hemisphere.