Since feeding involves all sensory systems (sight, smell, sound, touch, and taste), eating is the most difficult sensory task that children face. Feeding issues are especially common in children with autism, including those with Aspergers, because of difficulties with sensory processing. In many cases, this leads to eating challenges at mealtimes.
“Food chaining,” from the book by the same name, is based on the child’s natural preferences and successful eating experiences—specifically the idea that we eat what we like. Food chaining introduces new foods that have the same flavors or sensory features as foods that are already preferred by the child, increasing the likelihood that the child will like the food.