People with severe or multiple disabilities may exhibit a wide range of characteristics, depending on the combination and severity of disabilities, and the person's age.  There are, however, some traits they may share, including:

* Limited speech or communication

* Difficulty in basic physical mobility

* Tendency to forget skills through disuse

* Trouble generalizing skills from one situation to another

* A need for support in major life activities, e.g. domestic, leisure, community use, and vocational

Source:  NICHCY