This thesis is a philosophical examination of the explanatory roles of diagnoses in psychiatry. In medicine, diagnoses normally serve as causal explanations of patients’ symptoms. Given that psychiatry is a discipline whose practice is shaped by medical traditions, it is often implied that its diagnoses also serve such explanatory functions. This is evident in clinical texts that portray psychiatric diagnoses as referring to diseases that cause symptoms. However, there are problems which cast doubt on whether such portrayals are justified. I (...) address these problems and examine whether psychiatric diagnoses provide explanations of symptoms. The first problem is conceptual. In diagnostic manuals, psychiatric diagnoses are defined by their symptoms. This suggests that invoking them as explanations of the symptoms amounts to circularity. I argue that this can be resolved with an appropriate conceptual framework that captures the complex semantic values of diagnostic terms and their different uses in clinical discourse. I put forward such a framework based on two-dimensional semantics. The second problem is ontological. Empirical research suggests that diagnostic categories in psychiatry do not correspond to invariant causal types, but are associated with variable combinations of diverse causes that interact across biological, psychological, and social levels. Given this heterogeneity, I argue that psychiatric diagnoses fall short of paradigmatic cases of causal explanation, but that some can still provide other sorts of useful causal explanatory information. The original contribution of this thesis is the illumination of the conceptual relations between diagnoses and symptoms. This philosophical work is important, because it can be brought to valuable application in modifying psychiatric practice. (shrink)

Just as sadness is not always a symptom of mood disorder, irrational beliefs are not always symptoms of illness. Pathological irrational beliefs are distinguished from non-pathological ones by considering whether their existence is best explained by assuming some underlying dysfunctions. The features from which to infer the pathological nature of irrational beliefs are: un-understandability of their progression; uniqueness; coexistence with other psycho-physiological disturbances and/or concurrent decreased levels of functioning; bizarreness of content; preceding organic diseases known to be associated with irrational (...) beliefs; treatment response to medical intervention, etc. Severe irrationality is sometimes caused by normal human motivation rather than by mental or physical dysfunction. Pure forms of self-deception may satisfy the diagnostic criteria of delusional disorder, but there may be no evidence that suggests that they are caused by illness. Although those with pathological delusions do not recognize their delusions as symptomatic of illness, differentiating pathological beliefs from normal irrational beliefs is vitally important: If a belief is pathological, psychiatrists must seriously consider treating the patient against her will. If it is not pathological, conversely, involuntary treatments are prohibited because they offend her basic autonomy. (shrink)

Use of medication for treatment of ADHD (or its historical precursors) has been debated for more than forty years. Reasons for the ongoing differences of opinion are analyzed by exploring some of the arguments for and against considering ADHD a mental disorder. Relative to two important DSM criteria — that a mental disorder causes some sort of harm to the individual and that a mental disorder is the manifestation of a dysfunction in the individual — ADHD’s classification as a mental (...) disorder is found to be contentiously value-laden. The disagreements spill over to reasoning regarding appropriate management, because justification for a drug prescription is in part predicated on the idea that the drugs manage mental disorders. These debates do not appear to be nearing resolution, so individuals offering advice, or trying to decide whether ADHD drugs are appropriate for themselves or their children, may find it helpful to compare the values underlying various perspectives with their own. (shrink)

The growing use of genetic tests in medical practice has a strong influence on some widespread notions of health and unhealth. Two consequences of this phenomenon are: (i) important changes in the meaning of these current notions and, therefore, (ii) the arrival of a new taxonomy or rearrangement for the so-called “health-concepts”. This paper attempts to demonstrate that both facts fuel a theoretical change that might be considered a model of scientific Kuhnean change in a fundamental aspect. On the other (...) hand, this theoretical shift process offers the basis for approaching a present-day controversy, i.e. whether Western society is going through a period of geneticization or not, from a new perspective. (shrink)

Scientific medicine has been successful by ways of an ever more detailed understanding and mastering of bodily functions and dysfunctions. Biomedical research promises new triumphs, but discontent with medical practice is all around. Since several decades this has been acknowledged and discussed. The philosophical traditions of phenomenology and hermeneutics have been proposed as promising ways to approach medical practice, by ways of a richer understanding of the meaning structures of health and illness. In 2000, Swedish philosopher Fredrik Svenaeus published a (...) book where he proposes that the phenomenological hermeneutics of Martin Heidegger and also the reflections on health and illness of Hans-Georg Gadamer offer important ways to approach the nature of medicine. In particular, Svenaeus argues that the goal of medicine is to promote and restore health, and that health ought to be seen as “homelike being-in-the-world”. Unhealth, illness, consequently should be understood as a situation where a person’s “being-in-the-world” in characterized by that lack of the rhythm, balance and “tune” of everyday living that characterizes not “being at home”. In this article, Svenaeus’ position is briefly outlined. Questions are raised whether “unhomelikeness” is to be seen as a metaphor, and, if so, if it is a fruitful such. Furthermore, I discuss whether or not a discourse on health and illness in these terms may be misleading in a situation where the ontological presuppositions of Heidegger are lost out of sight and the popular understanding of health psychology predominates. I also approach the question whether Svenaeus’ assumptions may inadvertently lead us to an unjustifiably broad understanding of the tasks of medicine. It is finally concluded that Svenaeus phenomenological and hermeneutical approach is both interesting and promising. There are, however, several questions that ought to be pursued further, and the step from philosophical analysis to everyday clinical discourse may be unexpectedly long and risky. (shrink)