Hallucinations and Strong Priors. Corlett, P. R., Horga, G., Fletcher, P. C., Alderson-Day, B., Schmack, K., & Powers, A. R. Trends in Cognitive Sciences, 23(2):114–127, February, 2019. doi abstract bibtex Hallucinations, perceptions in the absence of objectively identifiable stimuli, illustrate the constructive nature of perception. Here, we highlight the role of prior beliefs as a critical elicitor of hallucinations. Recent empirical work from independent laboratories shows strong, overly precise priors can engender hallucinations in healthy subjects and that individuals who hallucinate in the real world are more susceptible to these laboratory phenomena. We consider these observations in light of work demonstrating apparently weak, or imprecise, priors in psychosis. Appreciating the interactions within and between hierarchies of inference can reconcile this apparent disconnect. Data from neural networks, human behavior, and neuroimaging support this contention. This work underlines the continuum from normal to aberrant perception, encouraging a more empathic approach to clinical hallucinations.
@article{corlett_hallucinations_2019,
title = {Hallucinations and {Strong} {Priors}},
volume = {23},
issn = {1879-307X},
doi = {10.1016/j.tics.2018.12.001},
abstract = {Hallucinations, perceptions in the absence of objectively identifiable stimuli, illustrate the constructive nature of perception. Here, we highlight the role of prior beliefs as a critical elicitor of hallucinations. Recent empirical work from independent laboratories shows strong, overly precise priors can engender hallucinations in healthy subjects and that individuals who hallucinate in the real world are more susceptible to these laboratory phenomena. We consider these observations in light of work demonstrating apparently weak, or imprecise, priors in psychosis. Appreciating the interactions within and between hierarchies of inference can reconcile this apparent disconnect. Data from neural networks, human behavior, and neuroimaging support this contention. This work underlines the continuum from normal to aberrant perception, encouraging a more empathic approach to clinical hallucinations.},
language = {eng},
number = {2},
journal = {Trends in Cognitive Sciences},
author = {Corlett, Philip R. and Horga, Guillermo and Fletcher, Paul C. and Alderson-Day, Ben and Schmack, Katharina and Powers, Albert R.},
month = feb,
year = {2019},
pmid = {30583945},
pmcid = {PMC6368358},
keywords = {Hallucinations, Humans, Illusions, Nerve Net, Speech Perception, auditory verbal hallucinations, hallucinations, predictive coding, prior beliefs, psychosis},
pages = {114--127},
}
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