CognitiveTaskOverview: TestMyBrainGradCPTContact: Info@ManyBrains.netManyBrains.netTestMyBrain.org
TMBTest Name: TestMyBrainGradual Onset ContinuousPerformanceTestTest Demo: standardversionDocument Version: June.05.2024Acknowledgements:- Original in-labtest createdby: MikeEsterman, PhDandJoeDeGutis, PhD, at theBostonAttentionandLearningLab(https://www.bu.edu/ballab/index.html)- “TMBGradCPTCity/MountainImages”byEsterman&DeGutisislicensedunder CC-BY-SA4.0.
TheManyBrainsProjectTheManyBrainsProject, isa501(c)(3) non-profit that supportsTestMyBrain(TMB) incollaborationwiththeLaboratoryfor BrainandCognitiveHealthTechnologyat McLeanHospital andHarvardMedicalSchool. Wecurrentlysupport manydifferent typesof researchstudiesthroughour infrastructureforcognitiveassessment - theserangeinsizefromsmall lab-basedpilot studiestolargelongitudinal,multisiteclinical researchstudieswithtensof thousandsof participants. AsTestMyBrainhasbeencontinuouslyinoperationsince2008, weprovideastableandsecureplatformfor hostinganddeliveringmobileandweb-basedcognitiveassessment protocols. ThroughTestMyBrain.org, datahavebeencollectedfromover 3.7millionparticipantsinacitizenscienceframeworkthat includesstructuredreturnof researchresultstowardthedevelopment, validation, andnormativecharacterizationof cognitivemeasures. Wecurrentlysupport researchandeducationat over 2,000sitesworldwideengagedindigitalneuropsychological assessment.
CITATIONPleasecredit TheManyBrainsProject andTestMyBraininanypapers, posters, or publicationsrelatedtotheTMBtestsor datacollectedbyTMBtests.● Example:- All taskswereselectedfromandhostedonTheManyBrainsProject’sweb-basedcognitivetestingplatform, TestMyBrain(Germineet al., 2012; TheManyBrainsProject).- Germine, L., Nakayama, K., Duchaine, B. C., Chabris, C. F., Chatterjee, G., &Wilmer, J. B. (2012). IstheWebasgoodasthelab?ComparableperformancefromWebandlabincognitive/perceptual experiments. PsychonomicBulletin&Review, 19(5), 847-857.- TheManyBrainsProject. TestMyBrainCognitiveTests. URL:www.manybrains.net
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Test Overview
Background:TheTestMyBrainGradualOnsetContinuousPerformanceTest(GradCPT; Fortenbaughetal.,2015;Rileyetal.,2016,2017;Singhetal.,2021;Treviñoetal.,2021;Vogeletal.,2020),adaptedfromEstermanetal.(2013)andRosenbergetal.(2013),isatestofsustainedattentionandinhibitorycontrol,acoreaspectofexecutivefunctioning.
TaskParameters:Participantsviewasequenceof300circular, grayscaleimagesofcitiesandmountainsconstructedtohaveequalmeanluminanceandcontrast,withtheimagesgraduallytransitioningfromonetothenextevery800ms.Participantsareinstructedtomakeakeyboardpress(keyboardinput)ortapthescreen(touchinput)whenimagesofcitiesarepresented(89.3%oftrials),andwithholdfromrespondingwhenmountainimagesarepresented(10.7%oftrials).Thetotaldurationoftheimagesequenceis4minutes.Participantscomplete36unscoredpracticetrialsbeforebeginningthe300testtrials.Allparticipantsviewthesameimagesinthesameorder.
PrimaryOutcome:Thetest'ssuggestedprimaryoutcomeisdiscriminationability(dprime),ameasureofresponseaccuracyunaffectedbyresponsebias,whichrepresentstheparticipant'sabilitytowithholdresponsestomountainswhilemakingresponsestomoreprevalentcityimages.Secondaryoutcomemeasuresofinterestincluderesponsebias,commissionerrorrate,reactiontime,andreactiontimevariability. SeeStanislaw&Todorov(1999)andthesupplementofFortenbaughetal.(2015)forinstructionsoncalculatingdprimeandotheroutcomesofinterest.
UserInput:Participantsusingakeyboardareinstructedtousethespacebarwhenmakingresponses,butthetestwillacceptresponsesfromanykey. Iftheparticipant’sdevicehastouchcapability, atthebeginningofthetesttheparticipantwillbegiventheoptiontorespondusingtouchinputorkeyboardinput.Otherwise,theparticipantmustusekeyboardinput.
AlternateTaskVersions:Alternateformsofthetestareavailableforrepeatedadministration.Additionally, shorterversionsareavailable,includinganultra-brief,EMA-compatibleversion(Hawksetal.,2023;Singhetal.,2023).
Psychometrics:● Reliability: Insingle-sessiontesting,variationinperformance(dprime)betweenparticipantshasasplit-halfreliabilityof.86.SeeHawksetal.,2023andSinghetal.,2023forpsychometricdetailsofmultiple-sessionEMAadministration.● Scoredistribution:
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References:
Esterman,M.,Noonan,S.K.,Rosenberg,M.,&DeGutis,J.(2013).Inthezoneorzoningout?Trackingbehavioralandneuralfluctuationsduringsustainedattention.CerebralCortex,23(11),2712-2723Fortenbaugh,F. C.,DeGutis,J.,Germine,L.,Wilmer, J.B.,Grosso,M.,Russo,K.,&Esterman,M.(2015).SustainedAttentionAcrosstheLifeSpaninaSampleof10,000:DissociatingAbilityandStrategy. PsychologicalScience, 26(9),1497–1510.Hawks,Z.W.,Strong,R.,Jung,L.,Beck,E.D.,Passell,E.J.,Grinspoon,E.,...&Germine,L.T.(2023).Accuratepredictionofmomentarycognitionfromintensivelongitudinaldata.BiologicalPsychiatry:CognitiveNeuroscienceandNeuroimaging, 8(8),841-851.Riley, E.,Okabe,H.,Germine,L.,Wilmer, J.,Esterman,M.,&DeGutis,J.(2016).Genderdifferencesinsustainedattentionalcontrolrelatetogenderinequalityacrosscountries.PloSOne, 11(11),e0165100.Riley, E.,Esterman,M.,Fortenbaugh,F. C.,&DeGutis,J.(2017).Time-of-dayvariationinsustainedattentionalcontrol.ChronobiologyInternational, 34(7),993-1001.Rosenberg,M.,Noonan,S.,DeGutis,J.,&Esterman,M.(2013).Sustainingvisualattentioninthefaceofdistraction:anovelgradual-onsetcontinuousperformancetask.Attention,Perception,&Psychophysics,75(3),426-439.Singh,S.,Strong,R.W.,Jung,L.,Li,F. H.,Grinspoon,L.,Scheuer, L.S.,Passell,E.J.,Martini,P.,Chaytor, N.,Soble,J.R.,&Germine,L.(2021).TheTestMyBrainDigitalNeuropsychologyToolkit:DevelopmentandPsychometricCharacteristics.JournalofClinicalandExperimentalNeuropsychology, 43(8),786-795.Singh,S.,Strong,R.,Xu,I.,Fonseca,L.M.,Hawks,Z.,Grinspoon,E.,Jung,L.,Li,F, Weinstock,R.S.,Sliwinski,M.,Chaytor, N.,&Germine,L.T. (2023).EcologicalMomentaryAssessmentofCognitioninClinicalandCommunitySamples:ReliabilityandValidityStudy.JournalofMedicalInternetResearch, 25, e45028Stanislaw, H.,&Todorov, N.(1999).Calculationofsignaldetectiontheorymeasures.BehaviorResearchMethods,Instruments,&Computers, 31(1),137-149.Treviño,M.,Zhu,X.,Lu,Y. Y.,Scheuer, L.S.,Passell,E.,Huang,G.C.,...&Horowitz,T.S. (2021).Howdowemeasureattention?Usingfactoranalysistoestablishconstructvalidityofneuropsychologicaltests.CognitiveResearch:PrinciplesandImplications, 6(1),1-26.
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Vogel,S.C.,Esterman,M.,DeGutis,J.,Wilmer, J.B.,Ressler, K.J.,&Germine,L.T. (2020).Childhoodadversityanddimensionalvariationsinadultsustainedattention.FrontiersinPsychology, 11,691.
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