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
2010
Memory profiles in schizophrenia: Categorization validity and stability
Bell MD, Johannesen JK, Greig TC, Wexler BE. Memory profiles in schizophrenia: Categorization validity and stability. Schizophrenia Research 2010, 118: 26-33. PMID: 20085855, PMCID: PMC3699867, DOI: 10.1016/j.schres.2009.12.037.Peer-Reviewed Original ResearchConceptsSocial cognitive domainsMemory profileCognitive domainsHopkins Verbal LearningCluster analytic techniquesSocial cognitionVerbal learningVerbal memorySubcortical impairmentNeuropsychological assessmentCommunity mental health centerCortical impairmentMental health centersSchizoaffective disorderMotor speedCurrent studySchizophreniaIllness characteristicsMemoryUrban community mental health centerImpairmentSimple decision rulesCognitionCluster analysisCluster groups
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