Christian Perring

In this paper I argue that a Naturalist conception of personhood, such as the one defended by Derek Parfit, implies that there are degrees of personhood, i.e., that it makes sense to say one individual has a greater degree of personhood than another. I describe both criteria of general personhood, which distinguish between persons and non-persons, and criteria of particular personhood, which distinguish between one person and another. I examine some of the consequences for ethics, including the rights to life, self-determination, and treatment. There may be circumstances in medicine where we have to judge the value of a patient's life in order to decide what medical treatment, if any, to provide, and although it may be emotionally difficult and politically dangerous, one relevant factor is what degree of personhood that individual has

Philosophers and psychologists have long tried to understand people's irrational behaviour through concepts such as weakness of will, compulsion and addiction. The scientific basis of the project has been greatly enhanced by advances in cognitive psychology and neuroscience. However, some philosophers have also been critical of the more general conclusions drawn by the scientists. This is especially true when scientific researchers start making claims that go to philosophical issues, such as free will and responsibility. Conversely, some scientists have been critical of philosophical approaches for not understanding the results of recent research. I examined some of the recent history of scientific claims about addiction, and the rise of the claims from scientists to have shown that addiction is a brain disease and that addictive behaviour is compulsive. Given the well-confirmed evidence that addicts can modulate their behaviour in response to rewards, punishments and context, it is clear that according to normal definitions of compulsivity the behaviour of addicts is not typically compulsive, suggesting that neuroscientists are making an error in their interpretation of data. Since philosophers have expertise in making distinctions between different kinds of action and categorising them as free, weak-willed and compulsive, we will achieve a better interpretation of the neuroscience of addiction when taking this philosophical work into account. Conversely, given the status of science in the modern world, philosophers have to grapple with the latest neuroscientific discoveries and show the compatibility of their philosophical theories with the data for their approaches to maintain credibility

In response to recent concerns about the overmedication of children, this paper considers ethical and conceptual issues that arise in the issue of when children who are diagnosed with attention deficit hyperactivity disorder should be given stimulants such as the psychotropic drug Ritalin as part of their treatment. There is considerable resistance and worry about the possibility of overmedication. This is linked to the worry that the diagnosis of ADHD is overused, and the paper considers some reasons to worry about the overuse of the diagnosis itself. The paper then focuses on the resistance to the use of drugs, which is particularly strong for children in the gray area of diagnosis, where it is dubious whether the children really meet the strict diagnostic criteria. The reasons behind such resistance are often not well articulated, so part of the task of the paper is spell out what they might be. The reasons are given the following labels: side effects, unnaturalness, profit motives, thought control, competitiveness, and doctors' power. The paper ends in taking the polemical position that while there is some legitimate concern about possible short and long term side effects of children taking psychotropic drugs, the other reasons for resistance are not well‐founded.