Coma Confusion Resolved
Back in November, I blogged about the case of Rom Houben, a man who after more than two decades in what was apparently a persistent vegetative state was found to be conscious. Following the newspaper reports of the time – as I noted at the time, I had nothing to go on except newspaper reports – I described it as a case in which the locked-in state was misdiagnosed as vegetative state. These mistakes do, tragically, occur. But we now know that Rom Houben is not in the locked-in state at all. The diagnosis of locked-in state was made on the basis of the use of facilitated communication, a technique in which someone is supposedly helped to communicate. Usually the facilitator guides the hand of the person they aim to help; the idea being that they can compensate for the muscular weakness by sensitively interpreting the person’s movements. Facilitated communication became notorious in the 1990s, when it was found that in most cases in which it was used (mainly to communicate with severely autistic individuals) the facilitators were producing the message. The test is simple: put headphones in both the facilitator and the person they are trying to help, and ask them questions simultaneously. Sometimes both receive the same questions, sometimes they receive different questions. The finding is that answers are always to the questions asked of the facilitator (obviously the fact that the facilitators have gladly participated in this research is good evidence of their sincerity. How we can mistake our own movements for someone else’s is a fascinating question, explored interestingly by Daniel Wegner in The Illusion of Conscious Will).