Questions of personality have vexed mankind from the dawn of personhood: can people change? How do others perceive me? What is the difference between normal and pathological behavior? One's personality is so pervasive and all-important that it presents a clinical paradox of sorts: it is hard to assess our own personality, and impossible to overlook that of others.
A pervasive developmental disorder, autism affects information processing in multiple ways. Many people with autism have difficulties with social interactions and communication, sensory deficits, and poor motor coordination. Autistic people often have restricted interests and engage in repetitive behaviors.