People with autism may think in a rigid way. This means that they may find it difficult to consider alternatives or to accept when things are not as they expected. It can be difficult for them to think ahead and to guess what is going to happen next, which means that they may become scared or confused in some situations. This pattern of thinking means that people with autism often like routine and are good at setting up and following routines. They may have fixed interests and be adept at focussing on detail.