TheAvatarsintheMachine
DreamingasaSimulationofSocialReality
AnttiRevonsuo,JarnoTuominen&KatjaValli
Theideathatdreamingisasimulationofthewakingworldiscurrentlybecoming
Authors
afarmorewidelysharedandacceptedviewamongdreamresearchers.Several philosophers, psychologists, and neuroscientists have recently characterized dreamingintermsofvirtualreality,immersivespatiotemporalsimulation,orrealisticandusefulworldsimulation.Thus,theconceptionofdreamingasasimulated worldnowunifiesdefinitionsofthebasicnatureofdreamingwithindreamand consciousnessresearch.Thisnovelconceptofdreaminghasconsequentlyledto theideathatsocialinteractionsindreams,knowntobeauniversalandabundant featureofhumandreamcontent,canbestbecharacterizedasasimulationofhumansocialreality,simulatingthesocialskills,bonds,interactions,andnetworks thatweengageinduringourwakinglives.Yetthistemptingideahasneverbeforebeenformulatedintoaclearandempiricallytestabletheoryofdreaming. HereweshowthatatestableSocialSimulationTheory(SST)ofdreamingcanbe formulated,fromwhichempiricalpredictionscanbederived.Someofthepredictionscangaininitialsupportbyrelyingonalreadyexistingdataintheliterature, butmanymoreremaintobetestedbyfurtherresearch.WearguethattheSST shouldbetestedbydirectlycontrastingitspredictionswiththemajorcompeting theoriesonthenatureandfunctionofdreaming,suchastheContinuityHypothesis(CH)andtheThreatSimulationTheory(TST).Thesethreemajortheories ofdreamingmakedifferingpredictionsastothequalityandthequantityofsocial simulationsindreams.Wewilloutlinethefirststepstowardsatheory-and-hypothesis-drivenresearchprogramindreamresearchthattreatsdreamingasasimulatedworldingeneralandasasocialsimulationinparticular.Byfollowingthis researchprogramitwillbepossibletofindoutwhetherdreamingisarelatively unselectiveandthusprobablynon-functionalsimulationofthewakingworld(CH), asimulationprimarilyspecializedinthesimulationofdangerousandthreatening eventsthatpresentimportantchallengesforoursurvivalandprosperity(TST),or whetheritisasimulationprimarilyspecializedintrainingthesocialskillsand bondsmostimportantforushumansasasocialspecies(SST).Whatevertheevidencefororagainstthespecifictheoriesturnouttobe,inanycasetheconception ofdreamingasasimulatedworldhasalreadyprovedtobeafruitfultheoretical approachtounderstandingthenatureofdreamingandconsciousness.
antti.revonsuoꢀ@ꢀutu.fi HögskolaniSkövde Skövde,Sweden Turunyliopisto Turku,Finland
jarno.tuominenꢀ@ꢀutu.fi Turunyliopisto Turku,Finland
katvalꢀ@ꢀutu.fi Turunyliopisto Turku,Finland HögskolaniSkövde Skövde,Sweden
Commentator
martin.dreslerꢀ@ꢀdonders.ru.nl RadboudUniversiteitMedicalCenter Nijmegen,Netherlands
Editors
Keywords
metzingerꢀ@ꢀuni-mainz.de
Alteredstateofconsciousness|Avatar|Consciousness|Continuityhypothesis|
Dreaming|Evolutionary psychology|Inclusivefitness|Kin selection theory| Needtobelong|Practiseandpreparationhypothesis|Reciprocalaltruismtheory|Simulation|Socialbrainhypothesis|Socialmappinghypothesis|Social simulationtheory|Sociometertheory|Strengtheninghypothesis|Thedream self|Theinclusivefitnesstheory|Threatsimulationtheory|Virtualreality|Virtualrealitymetaphor
JohannesGutenberg-Universität Mainz,Germany
jennifer.windtꢀ@ꢀmonash.edu MonashUniversity Melbourne,Australia
Revonsuo,A.,Tuominen,J.&Valli,K.(2015).TheAvatarsintheMachine-DreamingasaSimulationofSocialReality.
InT.Metzinger&J.M.Windt(Eds).O p e n M I N D :32(T).FrankfurtamMain:MINDGroup.doi:10.15502/9783958570375
1|28
1 Introduction
There may be no Cartesian ghosts residing vergedtowardsamoreunifiedunderstandingof within the machinery of the brain, but still, the basic nature of dreams. A widely shared somethingratherpeculiarisgoingoninthere, conceptualizationofdreamingnowdepictsitas
especiallyduringthedarkesthoursofthenight. thes i m u l a t i o nofwakingreality.Wewillbriefly
Aswesleepandourbodiesceasetointeractbe- describe how this theoretical shift has taken haviourally with the surrounding physical placeandwherewecurrentlyareinthetheoretworld,ourconsciousexperiencesdonotentirely icaldefinitionofdreaming.Thistheoreticaldedisappear.Onthecontrary,duringsleepweof- velopmenthaspavedthewayforunderstanding tenfindourselvesembodiedandimmersedinan thes oc i a lnatureofdreamsintermsofsocial experiential reality, an altered state of con- simulation. sciousnesscalleddreaming. TheDreamSelf— Second,wewillexplorethenatureofsothecharacterwithwhichweidentifyourselves cialdreamsimulationinmoredetail.Inwhat inthedreamworld,andfromwhoseembodied sensecandreamingbetakenasasimulationof perspectivethedreamworldisexperienced—is ourhumans oc i a lreality?Howmuchandwhat whoIaminthedreamworld(Revonsuo2005). typesofsocialperceptionandinteractionoccur
Butwearenotaloneinthisalternative indreams?Thisquestioncanbebrokendown reality—thereareotherapparentlyliving,intel- intoanumberofmoredetailedquestions.We ligentbeingspresent, whoseemtosharethis willtrytoanswersomeofthesequestionsbased realitywithus.Weseeandinteractwithreal- onthealreadyexistingknowledgeandempirical istichumancharactersinourdreams.Theirbe- evidenceaboutthesocialnatureofdreams.Furhaviourandtheirveryexistenceinthedream thermore,wewilltrytoformulatemoreclearly world seem to be autonomous. The dream thequestionsthatcannotyetbeansweredempeoplewhoIencounterwithinthedreamseem piricallyduetothelackofappropriatedata. togoabouttheirownbusiness:Icannotpredict Third, we will review hypotheses that orcontrolwhattheywillsayordo.Yet,they, alreadyaddressthequestionofthesocialnature too,aresomehowproducedbymyowndream- ofdreamsorassignasocialsimulationfunction
- ingbrain.
- fordreams.Finally,wewilloutlinesomebasic
Ontheonehand,dreamingisasolipsistic ideasofaSocialSimulationTheory(SST)of experience:whenwedream, wedreamalone, dreamingthatmightoffersomeexplanationsfor andoutsidershavenowayofparticipatingin thesocialnatureofdreams,oratleastmight ourdream.Yetontheotherhand,dreamingis producewell-defined,testableresearchquestions
anintenselys oc i a lexperience,evenifthesocial concerning the possible f u n c t i ons of social
contactsand interactions in thedreamworld dreamsimulations. aremerelyvirtual.Inthispaper,wewillexplore Todescribeandexplainthesocialnature
theideathatdreamingisas i m u l a t e dworld,but of dreams as social simulation, concepts bor-
notonlyasimulationofthep hy s i c a lworld.Itis rowedfromvirtualrealitytechnologymaybe equally or perhaps even more importantly a applied, in this case to the social aspects of simulationofthes oc i a lworld.Wewillproceed dreaming.Oneoftheseconceptsisthenotionof inthefollowingway:
“avatar”:A s i m u l a t e d v i r t u a l h u m a n c ha r ac t er
First,wewillarguethataremarkablecon- whoplaystheroleofacorrespondingrealhuvergence has gradually emerged in theories manwithinavirtualreality.Ifdreamsareviraboutthenatureofdreaming.Thefieldusedto tualrealitiesinthebrain(Revonsuo1995),then beadisunifiedbattlegroundofdirectlyoppos- we ourselves within the dream world are ingviewsonwhatdreamsare,howexactlythe avatars,andweinteractwithotheravatarsinconceptof“dreaming”shouldbedefined,and sidethesimulatedreality.Somehow,thedreamontheproperlevelofdescriptionandexplana- ing brain is capable of creating credible, tionfordreaming.Recently,thefieldhascon- autonomous human simulations out of neural
Revonsuo,A.,Tuominen,J.&Valli,K.(2015).TheAvatarsintheMachine-DreamingasaSimulationofSocialReality.
InT.Metzinger&J.M.Windt(Eds).O p e n M I N D :32(T).FrankfurtamMain:MINDGroup.doi:10.15502/9783958570375
2|28
activities in the sleeping brain. A theory of consciousness. When dreaming is taken seridreamingasasocialsimulationshouldpredict ously,ideasaboutthenatureofconsciousness what kind of avatars are represented in our tendtoconvergeoninternalisttheoriesofcondreams,whattypesofinteractionsweengagein sciousnessthattakeconsciousnessanddreaming withthem,andinparticular,w h yitwouldbe to be varieties of the same internal pheusefultosimulatesuchavatarsandinteractions nomenon, whosemainfunctionistosimulate inourdreams—whatfunctions,ifany,dothey reality.
- serveforus.
- Oneoftheearliestattemptstoconceptual-
izebothwakingconsciousnessanddreamingas
2 Consciousnessasreality-modelingand theexpressionsofthesameinternally-activated world-simulation
neuralmechanism, onlydifferentlystimulated, wasputforwardbyLlinás&Paréin1991:
Dreamingisthemostuniversalandmostregularlyoccurring, aswellasaperfectlynatural [C]onsciousness is an intrinsic property andphysiological(asopposedtopathological), arisingfromtheexpressionofexistingdisalteredstateofconsciousness.Thus,anyplaus- positionsofthebraintobeactiveincerible(empiricalorphilosophical)theoryofcon- tainways.Itisaclosekintodreaming, sciousness should also describe and explain where sensory input byconstraining the dreaming as a major state of consciousness. intrinsicfunctionalstatesspecifies,rather Mosttheoriesofconsciousness,however,donot thaninforms,thebrainofthoseproperties considerdreamingatalloratleastdonotdis- ofexternalrealitythatareimportantfor cusstheresultsofdreamresearchinanydetail survival.[…]Thatconsciousnessisgener-
atedintrinsicallyisnotdifficulttounder-
Dreamingpresentsaparticularlydifficult standwhenoneconsidersthecompleteness challengeforexternalist,embodied,andenact- of the sensory representations in our
ivetypesoftheoriesofconsciousness. Theyall dreams.(1991,p.531) anchortheexistenceandnatureofconsciousnesstosomethingintheworldexternaltothe The argument by Llinás & Paré (1991) was brain,ortosomekindofbrain-worldrelations mostly based on considerationsof the shared that,atleastpartly, resideoutsidethebrain. neurophysiologicalmechanisms(inthethalamoBycontrast,theempiricalevidencefromdream corticalsystem)thatcouldactasthefinalcomresearchshowsthatfull-blown,complexsubject- monpathforbothdreamingandwakingconiveexperiencessimilarwithoridenticaltoex- sciousness.Bindinginformationtogetherwithin periencesduringwakefulness(e.g., Rechtschaf- thissystemintrinsicallygeneratesconsciousness fen&Buchignani1992),regularlyanduniver- (“Itbinds,thereforeIam”,Llinás2001,p.261); sallyhappenduringrapideyemovement(REM) but only during wakefulness is consciousness sleep.Theconsciousexperienceswehaveduring modulatedbysensory-perceptualinformation— dreamingareisolatedfrombehaviouralandper- in this model, wakefulness can be seen as a ceptual interactions with the environment, dream-likestate(Llinás&Ribary1994). whichrefutesanytheorythatstatesthatorgan- Although the idea that dreaming s i m u - ism-environment interaction or other external l a t e swakingconsciousnesswasimplicitinthis relationshipsareconstitutiveoftheexistenceof neuroscientifictheory,Llinás&Paré(1991)did
Afewtheoriesofconsciousnesshave,how- andconsciousnessinanydetail.Theoreticalapever,takendreamingasacentralstartingpoint proachescharacterizingthenatureofdreaming in their conceptualization and explanation of assimulation,basedonacombinationofphilosophical arguments and empirical facts about