Some people on the autism spectrum engage in repetitive behaviors constantly, while others only occasionally perseverate when they're stressed, anxious or upset Perseverate means to have a preoccupation with one or more stereotyped and restricted patterns of interest that is abnormal either in intensity or focus.
For many people with autism, though, perseveration or repetitive behavior is not only disturbing to others, but it's also a major roadblock to communication with others and engagement in the world.
Trenton perseverates on his dvds daily. However, this past week he went to Harsha without his dvds three days this week!!! That is because he is perseverating on the giraffe that you see in the picture below. The giraffe has went to bed with him, went Harsha with him, sat on the counter while he took a bath, sat on the table while he ate...it went everywhere with him!!
If he left it in another room and he realizes it he immediately starts making his upset noises and starts hitting. HE PANICS WHEN HIS GIRAFFE IS NOT NEAR HIM!!