A developmental disorder is any condition that appears at some stage in a child's development and delays the development of one or more psychological functions, such as language skill. Developmental disorders include psychological and physical disorders, for example autism or dyslexia. Developmental disorders are an impairment in the normal development of motor or cognitive skills that are developed before age 22. They are usually expected to continue indefinitely, and there usually is no cure.
Developmental disorders can be grouped into specific developmental disorder and pervasive developmental disorders.
They are sometimes equated with developmental disabilities.
Read more about Developmental Disorder: Emergence of Developmental Disorders, Types of Developmental Disorders
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“The history of the genesis or the old mythology repeats itself in the experience of every child. He too is a demon or god thrown into a particular chaos, where he strives ever to lead things from disorder into order.”
—Ralph Waldo Emerson (1803–1882)