2024
Disentangling negative and positive symptoms in schizophrenia and autism spectrum disorder
Corbera S, Wexler B, Bell M, Pittman B, Pelphrey K, Pearlson G, Assaf M. Disentangling negative and positive symptoms in schizophrenia and autism spectrum disorder. Schizophrenia Research 2024, 271: 1-8. PMID: 39002525, PMCID: PMC11384336, DOI: 10.1016/j.schres.2024.07.002.Peer-Reviewed Original ResearchAutism spectrum disorderPositive and Negative Syndrome ScaleAutism Diagnostic Observation Schedule-GenericExperiential negative symptomsPositive symptomsNegative symptomsExploratory factor analysisSpectrum disorderNegative Syndrome ScaleTarget negative symptomsSyndrome ScaleDiscriminant function analysisSZ relativesAssociated with quality of lifeSchizophreniaSocial skillsSocial functioningDiagnostic classificationAutismFactor analysisAssociated with qualityPredictor of diagnosisSymptomsDisordersQuality of lifeWork Performance and Its Clinical Correlates in Patients With Chronic Mental Illness: The Chinese Version of Vocational Cognitive Rating Scale and the Work Behavior Inventory
Wang Y, Liu C, Chen K, Wu Y, Yen Y, Bell M, Chien Y. Work Performance and Its Clinical Correlates in Patients With Chronic Mental Illness: The Chinese Version of Vocational Cognitive Rating Scale and the Work Behavior Inventory. Psychiatric Rehabilitation Journal 2024, 47: 81-90. PMID: 37956062, DOI: 10.1037/prj0000590.Peer-Reviewed Original ResearchWork Behavior InventoryClinical correlatesCognitive Rating ScaleComprehensive Occupational Therapy Evaluation ScaleAffective symptomsMental illnessNegative symptomsRating ScaleGreater affective symptomsChronic mental illnessSevere mental illnessPersonalized rehabilitation programsChinese versionNegative Syndrome ScalePsychometric propertiesGood convergent validityTest-retest reliabilityClinical trialsChronic patientsRehabilitation programFunction assessmentSyndrome ScaleBehavior InventoryOccupational functionSymptoms
2018
T206. DOES AGE INFLUENCE RESPONSE TO COGNITIVE REMEDIATION?
Seccomandi B, Agbedjro D, Bell M, Keefe R, Keshavan M, Galderisi S, Medalia A, Fiszdon J, Maj M, Mucci A, Cavallato R, Wykes T, Cella M. T206. DOES AGE INFLUENCE RESPONSE TO COGNITIVE REMEDIATION? Schizophrenia Bulletin 2018, 44: s196-s197. PMCID: PMC5888761, DOI: 10.1093/schbul/sby016.482.Peer-Reviewed Original ResearchWisconsin Card Sorting TestLetter-Number SpanCognitive remediationExecutive functionEffect of ageCard Sorting TestTest Part BVerbal fluency scoresCognitive trainingHeinrichs-Carpenter QualityDigit spanIndividual differencesCognitive difficultiesSorting TestFluency scoresSignificant moderatorCognitive deficitsNegative Syndrome ScaleCR outcomesYears of educationSymptom reductionNegative symptomsLife ScalePrevious researchSyndrome Scale
2017
Effects of cognitive remediation on negative symptoms dimensions: exploring the role of working memory
Cella M, Stahl D, Morris S, Keefe R, Bell M, Wykes T. Effects of cognitive remediation on negative symptoms dimensions: exploring the role of working memory. Psychological Medicine 2017, 47: 2593-2601. PMID: 28866985, PMCID: PMC5647678, DOI: 10.1017/s0033291717000757.Peer-Reviewed Original ResearchExpressive negative symptomsCognitive remediationNegative symptomsEffect of CRLetter-Number Span TestControl conditionNegative symptom dimensionsNegative symptom reductionCognitive trainingCognitive underpinningsWM gainsCognitive domainsSpan testDigit spanSocial amotivationWM scoresMemory problemsSignificant mediatorNegative Syndrome ScaleSymptom dimensionsSymptom reductionAmotivation levelsCurrent findingsPossible mediatorsSyndrome Scale
2000
Emotional discomfort and impairments in verbal memory in schizophrenia
Lysaker P, Bell M, Greig T, Bryson G. Emotional discomfort and impairments in verbal memory in schizophrenia. Psychiatry Research 2000, 97: 51-59. PMID: 11104857, DOI: 10.1016/s0165-1781(00)00221-3.Peer-Reviewed Original ResearchConceptsVerbal memoryEmotional discomfortLogical memoryVerbal memory deficitsVerbal memory testsDigit Span subtestForms of memorySymptoms of dysphoriaEmotional discomfort symptomsCognitive symptom scoresMemory testPsychosocial deficitsMemory deficitsNegative Syndrome ScaleConcurrent measuresMemoryHopkins testFactor scoresSyndrome ScalePoor performanceMultiple regressionSchizophreniaGreater levelsDeficitsImpairment
1999
Internal consistency, temporal stability and neuropsychological correlates of three cognitive components of the Positive and Negative Syndrome Scale (PANSS)
Bryson G, Bell M, Greig T, Kaplan E. Internal consistency, temporal stability and neuropsychological correlates of three cognitive components of the Positive and Negative Syndrome Scale (PANSS). Schizophrenia Research 1999, 38: 27-35. PMID: 10427608, DOI: 10.1016/s0920-9964(99)00004-3.Peer-Reviewed Original ResearchConceptsNegative Syndrome ScaleSyndrome ScaleInternal consistencyCognitive componentsDSM-IV diagnosisSymptom compositionConcurrent validityDiscriminant validityCognitive dysfunctionCognitive test measuresSchizoaffective disorderPANSS factorsTemporal stabilityNegative symptomsAdequate temporal stabilityPANSS dataFactor analytic studiesSymptomsSchizophrenia researchSimilar psychometric propertiesSchizophreniaDisorganized symptomsNeuropsychological correlatesCognitive domainsPoorer psychometrics
1998
Neurocognitive function and insight in schizophrenia: support for an association with impairments in executive function but not with impairments in global function
Lysaker P, Bell M, Bryson G, Kaplan E. Neurocognitive function and insight in schizophrenia: support for an association with impairments in executive function but not with impairments in global function. Acta Psychiatrica Scandinavica 1998, 97: 297-301. PMID: 9570491, DOI: 10.1111/j.1600-0447.1998.tb10003.x.Peer-Reviewed Original ResearchConceptsExecutive functionImpaired insightWisconsin Card Sorting TestFrontal lobe functionCard Sorting TestGlobal cognitive functionLobe functionSorting TestNeuropsychological testsCognitive functionNegative Syndrome ScaleNeurocognitive functionInsight ratingNeurocognitive impairmentAbstract FlexibilitySyndrome ScaleSchizoaffective disorderMemorySchizophreniaImpairmentVigilanceScheffe testPerseverationDeficitsRatings
1995
Psychiatric symptoms and work performance among persons with severe mental illness
Bell M, Lysaker P. Psychiatric symptoms and work performance among persons with severe mental illness. Psychiatric Services 1995, 46: 508-510. PMID: 7627681, DOI: 10.1176/ps.46.5.508.Peer-Reviewed Original ResearchConceptsRatings of symptomsPsychiatric symptomsSevere mental illnessWork rehabilitation programNegative Syndrome ScaleWork Personality ProfileWork performanceRehabilitation programSchizoaffective disorderSyndrome ScaleMental illnessSymptomsSymptom componentsPowerful predictorHostility componentWeeksPositive componentPersonality profiles
1994
Concurrent validity of the cognitive component of schizophrenia: Relationship of PANSS scores to neuropsychological assessments
Bell M, Lysaker P, Milstein R, Beam-Goulet J. Concurrent validity of the cognitive component of schizophrenia: Relationship of PANSS scores to neuropsychological assessments. Psychiatry Research 1994, 54: 51-58. PMID: 7701028, DOI: 10.1016/0165-1781(94)90064-7.Peer-Reviewed Original ResearchConceptsWisconsin Card Sorting TestCognitive componentsNeuropsychological testsDigit Symbol Substitution TaskNegative syndromeCard Sorting TestSlosson Intelligence TestGorham's Proverbs TestNeuropsychological measuresSorting TestIntelligence testsSubstitution taskNeuropsychological assessmentPANSS scoresCognitive deficitsProverbs TestNegative Syndrome ScaleCognitive symptomsValid measureTest scoresConcurrent validityDiagnosis of schizophreniaCognitive impairmentSyndrome ScaleFactor analysisRelationship of Positive and Negative Symptoms to Cocaine Abuse in Schizophrenia
LYSAKER P, BELL M, BEAM-GOULET J, MILSTEIN R. Relationship of Positive and Negative Symptoms to Cocaine Abuse in Schizophrenia. The Journal Of Nervous And Mental Disease 1994, 182: 109-112. PMID: 8308528, DOI: 10.1097/00005053-199402000-00008.Peer-Reviewed Original ResearchConceptsCocaine-abusing subjectsNegative Syndrome ScaleCocaine abuseNegative symptomsParanoid subtypeSyndrome ScaleSubstance abuseMore frequent hospitalizationsFirst psychiatric hospitalizationLifetime substance abuseSevere negative symptomsSubstance abuse historyFrequent hospitalizationsPsychiatric hospitalizationAlcohol abusePositive symptomsMultivariate analysisSymptomsPatientsHospitalizationSignificant differencesSubtypesDiagnosisSchizophreniaMonths