Attention Deficit Disorder (ADD): A lifelong developmental disability (with onset in infancy, childhood or adolescence) that affects a child's ability to concentrate and control impulses. A child who has ADD is not hyperactive, but often has problems sustaining attention in task or play activities, difficulty in persisting with tasks to completion, and concentrating for longer periods of time.

 

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Attention Deficit Disorder (ADD): A lifelong developmental disability (with onset in infancy, childhood or adolescence) that affects a child's ability to concentrate and control impulses. A child who has ADD is not hyperacti . . . View Full Definition

Reactive Attachment Disorder: A condition with onset before age 5, resulting from an early lack of consistent care, characterized by a child's or infant's inability to make appropriate social contact with others. Symptom . . . View Full Definition

Schizoaffective Disorder: (skiz-o-a-feck-tiv) A condition that includes symptoms of both schizophrenia and affective (mood) disorder.

Polygenic Disorders: Genetic disorders resulting from the combined action of alleles of more than one gene (e.g., heart disease, diabetes, and some cancers). Although such disorders are inherited, they depend on . . . View Full Definition