Asperger syndrome (AS) a pervasive developmental disorder characterized by an inability to understand how to interact socially. Other features include clumsy and uncoordinated motor movements, social impairment with extreme obtuseness, limited interests and/or unusual preoccupations, repetitive routines or rituals, speech and language peculiarities, and non-verbal communication problems.
Attention Deficit Disorder (ADD) a disorder in individuals who have difficulty maintaining an attention span because of their limited ability to concentrate and who exhibit impulsive actions.
Attention Deficit/Hyperactive Disorder (ADHD) a condition where the child (in comparison to most children of the same age and sex) has a markedly reduced ability to: maintain attention, control doing, or saying something by thinking first, regulate the amount of physical activity according to the situation, or be motivated to listen to those in authority, and to act on what he/she has been told.
Autism a disorder of the brain that causes a lifelong developmental disability, primarily affecting the communication and social abilities of those who are afflicted by it.