Repetitive behaviors such as spinning objects or rocking. Certain behaviors exhibited to stimulate the senses, such as switching a light on and off repeatedly, or humming loudly. Difficulty with changes to surroundings or routines. Very high levels of activity for long periods of time. Uneven skill development.
Some skills are normal or superior for their age while others show significant delay.
Challenging behaviors such as aggression, self injury or severe withdrawal. Causes Nobody knows what causes autism. Some scientists believe there is a biological cause that affects the working of the brain, but this has not been proven. It is possible there are many factors that could interact with one another which could cause different characteristics in each individual with autism. Parents do not cause autism.