Monothematic Delusions: Towards a Two-Factor Account

@article{Davies2001MonothematicDT,
  title={Monothematic Delusions: Towards a Two-Factor Account},
  author={M. Davies and Max Coltheart and Robyn Langdon and Nora Breen},
  journal={Philosophy, Psychiatry, \& Psychology},
  year={2001},
  volume={8},
  pages={133 - 158}
}
We provide a battery of examples of delusions against which theoretical accounts can be tested. Then we identify neuropsychological anomalies that could produce the unusual experiences that may lead, in turn, to the delusions in our battery. However, we argue against Maher's view that delusions are false beliefs that arise as normal responses to anomalous experiences. We propose, instead, that a second factor is required to account for the transition from unusual experience to delusional belief… 

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References

SHOWING 1-10 OF 93 REFERENCES
The cognitive neuropsychology of delusions
After reviewing factors implicated in the generation of delusional beliefs, we conclude that whilst a perceptual aberration coupled with a particular type of attri-butional bias may be necessary to
Delusions and Brain Injury: The Philosophy and Psychology of Belief
Abstract: Circumscribed delusional beliefs can follow brain injury. We suggest that these involve anomalous perceptual experiences created by a deficit to the person's perceptual system, and
Accounting for Delusional Misidentifications
TLDR
Capgras' syndrome is suggested to involve impairment of processes that can support 'covert' recognition of familiar faces in prosopagnosia, and forms a potential 'mirror image' of the impairments underlying prosopagna, and earlier attempts to link the two conditions directly are questioned.
Refining the Explanation of Cotard’s Delusion
Recent work in cognitive neuropsychiatry explains the Capgras and Cotard delusions as alternative explanations of unusual qualitative states caused by dam-age to an affective component of the face
Sequential Cotard and Capgras delusions.
TLDR
It is suggested that the Cotard and Cap Gras delusions reflect different interpretations of similar anomalous experiences, and that the persecutory delusions and suspiciousness that are often noted in Capgras cases contribute to the patients' mistaking a change in themselves for a change for others.
Towards an Understanding of Delusions of Misidentification: Four Case Studies
Four detailed cases of delusions of misidentification (DM) are presented: two cases of misidentification of the reflected self, one of reverse intermetamorphosis, and one of reduplicative paramnesia.
Reasoning in Deluded Schizophrenic and Paranoid Patients: Biases in Performance on a Probabilistic Inference Task
An experiment is described in which deluded subjects with a diagnosis of schizophrenia or of delusional disorder (paranoia) were compared with a nondeluded psychiatric control group and a normal
Imagination, Delusion and Hallucinations
Chris Frith has argued that a loss of the sense of agency is central to schizophrenia. This suggests a connection between hallucinations and delusions on the one hand, and the misidentification of
The disorder of consciousness in schizophrenia.
  • R. Anscombe
  • Psychology, Medicine
    Schizophrenia bulletin
  • 1987
TLDR
The schizophrenic experience is described as an inability to sustain an intentional focus to attention, which prevents him from attending to the slight promptings of his subconscious, and when these emotions and intuitions are not amplified by being brought into focus, he loses a sense of himself.
Cognitive approaches to delusions: a critical review of theories and evidence.
TLDR
A multi-factorial model of delusion formation and maintenance incorporating a data-gathering bias and attributional style, together with other factors (e.g. perceptual processing, meta-representation) is consistent with the current evidence.
...
...