 Both approaches receive some support from empirical research. Disability theorists such as Goode 1994 and Ferguson 2001 maintain that people with significant cognitive and communicative impairments can and do have the capacity to choose among alternatives if those choices can be formulated in ways they can comprehend, or if their non-impaired intimates or caregivers can learn to read the ways in which they actually express their preferences, in order to help them make their lives go the way they want.