2021
Regression dynamic causal modeling for resting‐state fMRI
Frässle S, Harrison SJ, Heinzle J, Clementz BA, Tamminga CA, Sweeney JA, Gershon ES, Keshavan MS, Pearlson GD, Powers A, Stephan KE. Regression dynamic causal modeling for resting‐state fMRI. Human Brain Mapping 2021, 42: 2159-2180. PMID: 33539625, PMCID: PMC8046067, DOI: 10.1002/hbm.25357.Peer-Reviewed Original Research
2019
Does hallucination perceptual modality impact psychosis risk?
Niles H, Walsh B, Woods S, Powers A. Does hallucination perceptual modality impact psychosis risk? Acta Psychiatrica Scandinavica 2019, 140: 360-370. PMID: 31355420, PMCID: PMC6752971, DOI: 10.1111/acps.13078.Peer-Reviewed Original ResearchConceptsClinical high riskPerceptual abnormalitiesPsychosis riskNon-verbal contentAuditory perceptual abnormalitiesIndividuals ages 12Verbal experienceAuditory experienceCHR individualsThought contentCHR sampleUnusual thought contentPredictive validityAuditory scoresGustatory componentsAge 12Meeting criteriaPsychotic disordersPhenomenological aspectsInterview notesPsychosisConversion riskScoresIndividualsExperience
2017
Lack of Diagnostic Pluripotentiality in Patients at Clinical High Risk for Psychosis: Specificity of Comorbidity Persistence and Search for Pluripotential Subgroups
Woods SW, Powers AR, Taylor JH, Davidson CA, Johannesen JK, Addington J, Perkins DO, Bearden CE, Cadenhead KS, Cannon TD, Cornblatt BA, Seidman LJ, Tsuang MT, Walker EF, McGlashan TH. Lack of Diagnostic Pluripotentiality in Patients at Clinical High Risk for Psychosis: Specificity of Comorbidity Persistence and Search for Pluripotential Subgroups. Schizophrenia Bulletin 2017, 44: 254-263. PMID: 29036402, PMCID: PMC5814797, DOI: 10.1093/schbul/sbx138.Peer-Reviewed Original ResearchConceptsCHR syndromeDiagnostic outcomesCHR subgroupsClinical high-risk syndromeHigh-risk syndromeOnset of psychosisClinical high riskPersistence of anxietyEmergent psychosisCHR patientsRisk syndromeObservational studyCHR casesHigh riskNonpsychotic disordersComorbid disordersComparison subjectsBipolar disorderDiagnostic InterviewSyndromeDSM-IVPatientsPsychosisDiagnostic specificityComparison group
2015
Ketamine-Induced Hallucinations
Powers A, Gancsos MG, Finn ES, Morgan PT, Corlett PR. Ketamine-Induced Hallucinations. Psychopathology 2015, 48: 376-385. PMID: 26361209, PMCID: PMC4684980, DOI: 10.1159/000438675.Peer-Reviewed Original ResearchConceptsAuditory verbal hallucinationsPerceptual inputVerbal hallucinationsPredictive coding modelDelusion-like ideasPerceptual disruptionsPerceptual expectationsPerceptual environmentCoding modelPhenomenological experienceSensory stimuliStimulation environmentAuditory hallucinationsHealthy participantsHallmark symptomFirst-episode psychosisMusical hallucinationsMRI scannerHallucinationsParticipantsMagnetic resonance imaging (MRI) scannerPsychosisAmotivationPerceptVivid hallucinations
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
2009
Perceptual Training Narrows the Temporal Window of Multisensory Binding
Powers AR, Hillock AR, Wallace MT. Perceptual Training Narrows the Temporal Window of Multisensory Binding. Journal Of Neuroscience 2009, 29: 12265-12274. PMID: 19793985, PMCID: PMC2771316, DOI: 10.1523/jneurosci.3501-09.2009.Peer-Reviewed Original ResearchConceptsPerceptual trainingAudiovisual simultaneity judgment taskMultisensory temporal functionMultisensory temporal processingSimultaneity judgment taskPerceptual learning paradigmTemporal windowSame environmental eventAudiovisual simultaneityMultisensory bindingAudiovisual integrationAudiovisual pairsCognitive biasesJudgment taskTemporal processingVisual stimuliBrain's abilityTwo-alternativeLearning paradigmChoice paradigmTwo-intervalTemporal functionEnvironmental eventsTemporal boundsSecond experiment