Imperfect Cognitions

Today's post is by Nimra Ahsan. Nimra is a fifth year medical student at the University of Birmingham, where she is currently completing a Masters in Mental Health. She is interested in how the study of mental health can help inform and improve future clinical practice, including her own. This is the last post in a series of perspectives from students taking the Philosophy and Ethics of Mental Health and Wellbeing module. Nimra Ahsan The interaction between psychiatry and psychopathology is one that is blending (Stanghellini and Broome, 2014). With a contemporary focus on patient experience, human subjectivity (or phenomenology) is creating a holistic perspective concerning mental health conditions, such as schizophrenia. Described as a ‘disturbance of minimal self’, our understanding of schizophrenia has deepened and the ipseity-disturbance model developed by Sass and Parnas has contributed to this substantially ( Nelson, Parnas and Sass, 2014 ). This model led to the formation o...

This week we feature the project  Deluded by Experience , led by  Ema Sullivan-Bissett , who is a Reader in Philosophy at the University of Birmingham. The project will last 30 months (January 2021–June 2023) and is funded by the Arts and Humanities Research Council, with Ema as PI and  Paul Noordhof  as Co-I. You can follow the Project on twitter  @del_by_ex .  In today's blog, I ask Ema about the project. LB: What is  Deluded by Experience  about?  ESB:  Deluded by Experience  is focused on three main areas. The first is monothematic delusion formation. Philosophers, psychologists, and cognitive neuroscientists have argued that subjects with monothematic delusions have anomalous experiences in which delusions are rooted. However, few take anomalous experience to be the only clinically relevant factor. This is the one-factor approach. The current orthodoxy has it that a second clinical factor (cognitive deficit, bias...

This post is by Michael Connors and Peter Halligan. Here they discuss their recent paper entitled 'Delusions and theories of belief' that was published in Consciousness and Cognition . Michael Connors is a research associate in the Centre for Healthy Brain Ageing at the University of New South Wales. Peter Halligan is an honorary professor in the School of Psychology at Cardiff University.  Michael Connors One approach to understanding cognitive processes is through the systemic study of its deficits. Known as cognitive neuropsychology, the study of selective deficits arising from brain damage has provided a productive way of identifying underlying cognitive processes in many well-circumscribed abilities, such as reading, perception, attention, and memory. Peter Halligan The application of these methods to higher-level processes has been more contentious. Known as cognitive neuropsychiatry, researchers over the past 30 years have applied similar methods to studying delusions – ...

This post is by  Eisuke Sakakibara , psychiatrist working at  The University of Tokyo Hospital . In this post he writes about his paper “ Intensity of experience: Maher’s schizophrenic delusion revisited ” recently published in Neuroethics. Delusion is one of the most frequently discussed themes in philosophy of psychiatry, and this is my second publication regarding delusions. In my first paper, entitled “ Irrationality and pathology of beliefs ,” I proposed that not all delusions are pathological, and some delusions are formed without any physical or mental dysfunction. In my second paper , I focused on delusions accompanied by schizophrenia. As for schizophrenic delusions, it is beyond question that they are the result of dysfunction of some kind. The problem, then, is what kind of dysfunction is relevant for the development of schizophrenic delusions. The theory of schizophrenic delusion has developed by the consecutive works made by Brendan Maher. He proposed ...

Rolf Hvidtfeldt  is postdoctoral fellow at the  Humanomics Research Centre  at Aalborg University in Denmark. His research is mainly focused on the philosophies of science evaluation, scientific communication, and conflicts of perspective. Currently he is working on a  project  focused on mapping the various ways in which research (in a broad sense) affects (in a broad sense) society at large. He has recently published the book The Structure of Interdisciplinary Science in which he seeks to develop a method for examining epistemic aspects of interdisciplinary collaborations. The following blogpost briefly summarises key elements of ch. 8 of this book, which is a case study picked from schizophrenia research. In the The Structure of Interdisciplinary Science I develop a method, approach-based analysis, for studying interdisciplinary science in deep detail. Chapter 8 of the book is a case study in which this method is applied to a case of interdisciplina...

Today's post is by Chenwei Nie who is a PhD student at the Department of Philosophy, University of Warwick. His research focuses on philosophical issues related to beliefs and delusions. You can read his previous work here . Experiences and cognitive processes are two crucial elements in the formation and maintenance of delusions. Maher’s (1974) one-factor theory argues that delusions are reasonable responses to anomalous experiences. Motivated by the evidence that some people with anomalous experiences do not have delusions, the two-factor theory (e.g., Davies, Coltheart, Langdon, & Breen, 2001 ) argues that besides anomalous experiences, there is an impairment in the cognitive processes. In my understanding, delusions arise not because of either anomalous experiences or impaired cognitive processes alone, but due to a mismatch between them so that the impaired cognitive processes are not able to account for the anomalous experiences in a normal way. Since a mismatch...

Pacifico, Yokohama PERFECT was invited to present a symposium at the 31st International Congress of Psychology (ICP), which took place at Pacifico Yokohama in Japan and was attended by over 8000 people from 95 countries. The symposium, entitled ‘Explaining Delusion: Empirical and Theoretical Approaches to Delusion Formation’ featured speakers from philosophy (myself,  Rachel Gunn ), Kengo Miyazono and Phillip Gerrans) and from psychology (Eriko Sugimori and Rochelle Cox). Eriko Sugimori ’s talk entitled ‘Effects of Positive and Negative Delusional Ideation on Memory’ covered a study where participants were given a learning task in which they were shown 40 adjectives projected one at a time on a screen.  Fifteen minutes later they were shown 80 adjectives and asked to state whether those adjectives had featured in the learning task. The participants were assessed for delusion proneness as well as degree of positive delusional ideation (consisting of traits such as guarde...

This post is by David Miguel Gray (pictured above), currently Assistant Professor of Philosophy at Colgate University and in the Spring of 2017 will be Assistant Professor of Philosophy at the University of Memphis. David’s research interests are in the philosophy of cognitive psychology (in particular cognitive psychopathology), as well as philosophy of mind, and philosophy of race and racism. In this post David will address some theoretical issues with n-factor accounts of monothematic delusions. This post, and his previous one , will draw on his recent paper ‘ Failing to self-ascribe thought and motion: towards a three-factor account of passivity symptoms in schizophrenia ’, published in Schizophrenia Research. Cognitive-level theories of monothematic delusions have become heavily discussed, significantly in part to the work of Max Coltheart, Robyn Langdon, and Martin Davies (e.g. see Davies and Coltheart 2000 , Davies et al. 2001 , Coltheart et al. 2007 , Coltheart 2013 ). T...

This post is by David Miguel Gray (pictured above), currently Assistant Professor of Philosophy at Colgate University and in the Spring of 2017 will be Assistant Professor of Philosophy at the University of Memphis. David’s research interests are in the philosophy of cognitive psychology (in particular cognitive psychopathology), as well as philosophy of mind, and philosophy of race and racism.  I n this post David provides an explanation of abnormal experiences and the inferential processes involved in delusions of thought insertion and alien control. Next week, he will address some theoretical issues with n-factor accounts of monothematic delusions. Both posts will be drawing from his recent paper ‘ Failing to self-ascribe thought and motion: towards a three-factor account of passivity symptoms in schizophrenia ’, published in Schizophrenia Research. In my article I focus on two commonly known passivity symptoms of schizophrenia: thought insertion and alien ...

This post is by Gottfried Vosgerau , Professor of Philosophy at the University of Düsseldorf. Gottfried's research interests are in the philosophy and metaphysics of mind, neurophilosophy, and cognitive science. Here he summarises his recent paper, co-authored with Patrice Soom , ' A Functionalist Approach to the Concept of 'Delusion ', published in Journal for Philosophy and Psychiatry. Based on the widely accepted DSM definition of delusions, delusions are commonly held to be false beliefs about reality that are not shared by the community the subject lives in and that are sustained despite overwhelming counter-evidence. In our paper, we argue that this conceptualization cannot be used for a scientific investigation of delusions. For this purpose, we argue, delusions should be defined as mental states with asymmetric inferential profiles: While they have inferential impact on other mental states, they are not affected by other mental states (especially not affect...

Ema Sullivan-Bissett In this post I give an overview of what I did as a Research Fellow in the first year of project PERFECT , as well as my plans for the coming year. My research for the duration of my time working on PERFECT will focus on belief. Last year, Lisa and I worked together on three papers. The first, together with Matthew Broome and Matteo Mameli , was on the moral and legal implications of the continuity between delusional and non-delusional beliefs. The second, together with Rachel Gunn , was on what makes a belief a delusional belief. The third paper was on the status of beliefs from fiction and the teleological account of belief. My main focus this year though was on defending the one-factor account of monothematic delusion formation. According to this view, the only abnormality we need to appeal to in order to explain why a subject comes to hold a delusional belief, is the anomalous experience she has. We do not need to appeal to any abnormal deficit or bi...

Rachel Gunn Some postulate that for certain kinds of delusions sensory input is distorted such that the evidence available to the subject is altered and this evidence is therefore powerful enough to resist counter arguments. In this case the subject employs normal cognitive processes to explain perceptual anomalies and this results in delusion ( Maher 1974 ). If the experience of a subject provides or includes the evidence for a delusion and the experience is anomalous (outside ‘normal’ experience) then a third party cannot hope to grasp the subject’s explanation. Further, as Maher says, there is no point of intervention in any ordinary sense to dispute the subject’s delusion. If this theory holds water it is likely to only apply to a subset of delusional subjects.