2023
Evidence for Reduced Sensory Precision and Increased Reliance on Priors in Hallucination-Prone Individuals in a General Population Sample
Benrimoh D, Fisher V, Seabury R, Sibarium E, Mourgues C, Chen D, Powers A. Evidence for Reduced Sensory Precision and Increased Reliance on Priors in Hallucination-Prone Individuals in a General Population Sample. Schizophrenia Bulletin 2023, 50: 349-362. PMID: 37830405, PMCID: PMC10919780, DOI: 10.1093/schbul/sbad136.Peer-Reviewed Original ResearchSensory evidenceSensory precisionHallucinatory experiencesHallucination severityCH rateHallucination-prone individualsIncoming sensory evidencePrior weightingLinguistic versionsGaussian filter modelNonlinguistic stimuliPerceptual inferencePerceptual statesPerceptual beliefsResponse confidenceAuditory informationTask behaviorGeneral population sampleOnline sampleAuditory hallucinationsGeneral population participantsStimuliPast resultsParticipantsTask
2022
Conditioned Hallucinations and Prior Overweighting Are State-Sensitive Markers of Hallucination Susceptibility
Kafadar E, Fisher VL, Quagan B, Hammer A, Jaeger H, Mourgues C, Thomas R, Chen L, Imtiaz A, Sibarium E, Negreira AM, Sarisik E, Polisetty V, Benrimoh D, Sheldon AD, Lim C, Mathys C, Powers AR. Conditioned Hallucinations and Prior Overweighting Are State-Sensitive Markers of Hallucination Susceptibility. Biological Psychiatry 2022, 92: 772-780. PMID: 35843743, PMCID: PMC10575690, DOI: 10.1016/j.biopsych.2022.05.007.Peer-Reviewed Original ResearchConceptsCH rateIncoming sensory evidenceSensory evidencePerceptual statesTask performanceComputational psychiatrySubset of participantsPrior expectationsHallucination severityBehavioral dataSymptom severityPast experienceStable measureHallucinationsPsychotic symptomsHallucination frequencyTaskSymptom expressionBayesian modelState markerHallucinatorsNonhallucinatorsOverweightingPerceptionSymptom risk
2020
S197. PAVLOVIAN CONDITIONED HALLUCINATIONS TASKS AND PSYCHOMETRIC THRESHOLDING IN ENRICHED ONLINE SAMPLE
Kafadar E, Lim C, Powers A. S197. PAVLOVIAN CONDITIONED HALLUCINATIONS TASKS AND PSYCHOMETRIC THRESHOLDING IN ENRICHED ONLINE SAMPLE. Schizophrenia Bulletin 2020, 46: s113-s114. PMCID: PMC7234405, DOI: 10.1093/schbul/sbaa031.263.Peer-Reviewed Original ResearchAuditory verbal hallucinationsEmergence of hallucinationsAuditory stimuliNeural signaturesVisual stimuliUnusual experiencesOnline sampleIncoming sensory evidencePavlovian conditioning taskPredictive coding frameworkSalient auditory stimuliPrior beliefsPerceptual inferenceSensory evidencePerceptual experienceConditioning taskBrain processesTask methodologyResponses of participantsSensory modalitiesVerbal hallucinationsPotential therapeutic targetTask consistHallucinatory experiencesDiagnosis of psychosis