Data from imaging experiments as well as their social impairments suggest that people with autism may not perceive human movement correctly, but little work has been done to define these differences. Shiffrar and colleagues plan to determine how accurately people with autism observe and interpret human movement. The researchers plan to use points of light to depict the movement of objects and humans. Typical observers are more sensitive to human movement than to the movement of objects. Shiffrar and colleagues have gathered preliminary data suggesting that observers with autism are equally sensitive to people and objects in motion. Their research program takes a two-pronged approach: They first plan to precisely measure how accurately individuals with autism perceive the movements of other people. The researchers then plan to study three factors that probably converse to define visual sensitivity to human movement: visual experience, motor experience, and social-emotional processes. These findings could also have important therapeutic applications. By learning how those with autism observe others, more effective training programs could perhaps be developed to help them recognize and respond to social cues.