View the YouTube video on sensory at https://www.youtube.com/watch?v=D1G5ssZlVUw 

What is sensory processing disorder?  Describe and discuss the symptoms. How does this relate to autism?

There is a great deal of discussion about the cause of autism.  Study the possibilities and post your insights and findings. Along with your textbook, use the article at http://link.springer.com/article/10.1007/s10803-011-1413-8 for further guidance concerning Autism.