2024
The mechanisms underlying conditioning of phantom percepts differ between those with hallucinations and synesthesia
del Rio M, Kafadar E, Fisher V, D’Costa R, Powers A, Ward J. The mechanisms underlying conditioning of phantom percepts differ between those with hallucinations and synesthesia. Scientific Reports 2024, 14: 5607. PMID: 38453946, PMCID: PMC10920618, DOI: 10.1038/s41598-024-53663-3.Peer-Reviewed Original Research
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 resultsParticipantsTaskA novel computational approach to pain perception modelling within a Bayesian framework using quantitative sensory testing
Drusko A, Baumeister D, McPhee Christensen M, Kold S, Fisher V, Treede R, Powers A, Graven-Nielsen T, Tesarz J. A novel computational approach to pain perception modelling within a Bayesian framework using quantitative sensory testing. Scientific Reports 2023, 13: 3196. PMID: 36823292, PMCID: PMC9950064, DOI: 10.1038/s41598-023-29758-8.Peer-Reviewed Original ResearchConceptsHierarchical Gaussian FilterPrior expectationsRelevant individual differencesPain perceptionLearning-based interventionsTesting paradigmCognitive processesSensory evidenceIndividual differencesPsychophysical paradigmInferential processesVisual cuesElectrical cutaneous stimulusPrior weightingPerceptionPain stimuliPrior beliefsIndividual levelNociceptive inputBeliefsGreater relianceStimuliStrong weightingAcute pain stimuliParadigm
2018
Hallucinations and Strong Priors
Corlett PR, Horga G, Fletcher PC, Alderson-Day B, Schmack K, Powers AR. Hallucinations and Strong Priors. Trends In Cognitive Sciences 2018, 23: 114-127. PMID: 30583945, PMCID: PMC6368358, DOI: 10.1016/j.tics.2018.12.001.Peer-Reviewed Original ResearchConceptsAberrant perceptionsClinical hallucinationsRecent empirical workConstructive natureHuman behaviorIdentifiable stimuliEmpathic approachPrior beliefsLight of workPerceptionHallucinationsEmpirical workStrong priorsReal worldLaboratory phenomenonNeural networkStimuliApparent disconnectBeliefsPsychosisIndividualsHealthy subjectsSupportInference
2016
Hallucinations as Top-Down Effects on Perception
Powers AR, Kelley M, Corlett PR. Hallucinations as Top-Down Effects on Perception. Biological Psychiatry Cognitive Neuroscience And Neuroimaging 2016, 1: 393-400. PMID: 28626813, PMCID: PMC5469545, DOI: 10.1016/j.bpsc.2016.04.003.Peer-Reviewed Original ResearchContemporary cognitive neuroscienceCognitive science communityHigh-level cognitionPredictive coding modelHierarchical brain networksCognitive penetrationPerceptual priorsCognitive neurosciencePerceptual processesCognitive neuropsychiatryComputational neuroimagingModular viewMental organizationCoding modelBrain networksPerceptionMental illnessHierarchical modelCognitionNeuroscienceStimuliNeuroimagingHallucinationsNeuropsychiatryFindingsGeneralization of multisensory perceptual learning
Powers III AR, Hillock-Dunn A, Wallace MT. Generalization of multisensory perceptual learning. Scientific Reports 2016, 6: 23374. PMID: 27000988, PMCID: PMC4802214, DOI: 10.1038/srep23374.Peer-Reviewed Original ResearchConceptsSound-induced flash illusionMultisensory perceptual learningPerceptual learningSimultaneity judgment taskVisual temporal acuityMeasures of perceptionsAbility of trainingPerceptual trainingFlash illusionMultisensory tasksAudiovisual stimuliMultisensory trainingMultisensory worldJudgment taskGeneralization effectsTemporal acuityInfluence perceptionsDifferent sensesControl conditionStimuliTraining resultsTrainingPerceptionTaskLearning
2010
Binding of sights and sounds: Age-related changes in multisensory temporal processing
Hillock AR, Powers AR, Wallace MT. Binding of sights and sounds: Age-related changes in multisensory temporal processing. Neuropsychologia 2010, 49: 461-467. PMID: 21134385, PMCID: PMC3140703, DOI: 10.1016/j.neuropsychologia.2010.11.041.Peer-Reviewed Original ResearchConceptsMultisensory temporal processingTemporal processingLong stimulus onset asynchroniesAudiovisual temporal perceptionMultisensory temporal functionAudiovisual temporal asynchronyStimulus onset asynchronyRelatedness of stimuliAge-related differencesSignificant group differencesMultisensory processesMultisensory stimuliMultisensory worldTemporal perceptionOnset asynchronyAuditory cuesAuditory stimuliVisual stimuliTemporal asynchronyAge-related changesGroup differencesExternal eventsStimuliTemporal functionAsynchrony