Featured Publications
Compared to high and low cannabis use, moderate use is associated with fewer cognitive deficits in psychosis
Martin A, Bonfils KA, Davis BJ, Smith EA, Schuder K, Lysaker PH. Compared to high and low cannabis use, moderate use is associated with fewer cognitive deficits in psychosis. Schizophrenia Research Cognition 2016, 6: 15-21. PMID: 28740820, PMCID: PMC5514308, DOI: 10.1016/j.scog.2016.09.001.Peer-Reviewed Original ResearchLifetime cannabisCannabis useLess impairmentGroup of patientsDose related responsePoor levelCannabis/Assessment of neurocognitionLifetime cannabis usePoor cognitionSevere impairmentCognitive deficitsCognitive functionLower cannabisModerate cannabisCannabisSchizophreniaImpairmentHigher cannabisNeurocognition
2019
Individuals with psychosis and a lifetime history of cannabis use show greater deficits in emotional experience compared to non-using peers
Martin A, Lysaker PH. Individuals with psychosis and a lifetime history of cannabis use show greater deficits in emotional experience compared to non-using peers. Journal Of Mental Health 2019, 29: 77-83. PMID: 30822177, DOI: 10.1080/09638237.2018.1487540.Peer-Reviewed Original ResearchConceptsEmotional Expressivity ScaleEmotional experienceSocial Functioning ScaleEmotional expressionAnticipatory pleasureLifetime cannabisSocial functioningGreater deficitsSocial functionCannabis useNon-using peersAnticipation of pleasureExperience of pleasurePoor social functionEmotional expressivityLifetime historyAnticipatory anhedoniaProsocial activitiesActive cannabisPleasure ScaleTemporal experienceHistory of cannabisFunctioning ScaleEarly psychosisPrevious research
2017
The positive link between executive function and lifetime cannabis use in schizophrenia is not explained by current levels of superior social cognition
Helle S, Løberg EM, Gjestad R, Martin A, Lysaker PH. The positive link between executive function and lifetime cannabis use in schizophrenia is not explained by current levels of superior social cognition. Psychiatry Research 2017, 250: 92-98. PMID: 28152399, DOI: 10.1016/j.psychres.2017.01.047.Peer-Reviewed Original ResearchConceptsSocial cognitionTheory of mindExecutive functionCannabis useBell-Lysaker Emotion Recognition TestEmotion Recognition TestExecutive Functioning ScaleBetter executive functionRegular cannabis useStructural equation modelingHinting testIllicit substancesNeurocognitive vulnerabilityRecognition testNeurocognitive performanceNeurocognitive deficitsCognitionEquation modelingFlexibility componentsAlcohol useFunctioning ScaleLifetime cannabisIndirect effectsPositive linkSchizophrenia