Autism also referred as infantile autism or autistic disorder, is a lifelong disorder that causes abnormal neurological development. Autism may result in impaired social interaction, communication difficulties, and restricted or repetitive activities and interests. People with autism often exhibit abnormal responses to sensory stimulation (e.g., touch, sound, light), usually have moderate mental retardation, and have a higher risk for developing epilepsy. Some autistic patients may show aggression and self-injurious behavior (e.g., head banging, biting themselves).

Autism is a neurological developmental disability that results in limited cognitive abilities such as the autistic individual is limited in ability to learn inductively from surrounding events, social interactions like communication and many kinds of conceptual learning can be strongly limited. At the same time, the autistic individual may be outstandingly good at some kinds of mental manipulations for example arithmetical calculations.

Autism is a severe developmental disorder that affects the way a child sees and interacts with the rest of the world. It limits their ability to interact with others socially, in fact many autism suffers avoid human contact. Autism is a part of a larger group of disorders named as pervasive developmental disorders (PDD).