2017
Early Initiation of Amphetamine-Type Stimulants (ATS) Use Associated with Lowered Cognitive Performance among Individuals with Co-Occurring Opioid and ATS Use Disorders in Malaysia
Chooi WT, Zaharim N, Desrosiers A, Ahmad I, Yasin MAM, Jaapar S, Schottenfeld RS, Vicknasingam BK, Chawarski MC. Early Initiation of Amphetamine-Type Stimulants (ATS) Use Associated with Lowered Cognitive Performance among Individuals with Co-Occurring Opioid and ATS Use Disorders in Malaysia. Journal Of Psychoactive Drugs 2017, 49: 326-332. PMID: 28661714, PMCID: PMC6218246, DOI: 10.1080/02791072.2017.1342152.Peer-Reviewed Original ResearchConceptsCognitive performanceStandard Progressive MatricesRey-Osterrieth Complex Figure TestSymbol digit substitution taskCognitive performance groupsComplex Figure TestRaven's Standard Progressive MatricesATS use disorderATS useDigit spanTrail MakingCognitive functioningFigures TestAmphetamine-type stimulant useSubstitution taskProgressive MatricesFunctioning profilesDrug useCo-occurring opioidGroup differencesCurrent study findingsStimulant useClusters of individualsATS dependenceUse disorders
2013
Impulsivity, cognitive function, and their relationship in heroin-dependent individuals
Zeng H, Lee TM, Waters JH, So KF, Sham PC, Schottenfeld RS, Marienfeld C, Chawarski MC. Impulsivity, cognitive function, and their relationship in heroin-dependent individuals. Journal Of Clinical And Experimental Neuropsychology 2013, 35: 897-905. PMID: 24040894, DOI: 10.1080/13803395.2013.828022.Peer-Reviewed Original ResearchConceptsCognitive functionAbstinent heroin-dependent individualsHeroin-dependent individualsSelf-reported impulsivitySelf-report measuresCognitive abilitiesMotor impulsivityImpulsivityExperience seekingComputerized assessmentMixed evidenceHeroin dependenceIndividualsFunctional weaknessDistractibilityMemorySeekingTherapeutic interventionsInterventionImplicationsMeasuresAbilityRelationshipDecisions