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　　标题：ThisFoodPsychologyExperimentWasNearlyFoiledByChronicPoliteness
　　source：io9丨byEstherInglisArkell
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　　Psychologyexperimentshavetostraddlethelinebetweenlettingpeopleactnaturally，andforcingthemtoactoutanextremelyspecificsituation。Sometimesthatdoesn’tworkout。Here’sanexperimentthatdrovepsychologistscrazy。Why？BecausetheyunderestimatedthepolitenessofMinnesotans。
　　PsychologistTraciMannrunsafoodlabattheUniversityofMinnesota。ShehelpedNASAdevelopastudycurrentlytestingthestressreducingabilityofcomfortfoodinspace。That’sacomplicatedproposition，butoneofherexperimentsprovided（accidental）proofthatevensimpletestscanmakeexperimentersteartheirhairoutwithfrustration。
　　Mannandherstafftestedoutwhetheraperson，workingonaprojectwithtwofriends，wouldspecificallychoosehealthyfoodsandignoreunhealthyfoodsiftheirfriendsdidthesame。Unsurprisingly，theywould。Surprisingly，thiswasatoughexperimenttotest。Thescientistshadtoputoutaspreadofmeats，cheeses，veges，andpastriesforeachexperimentaltrio。They’dcoachedthetwofriendstoonlyputvegesontheirplate，andplannedtoseewhatthelast，uncoachedpersonwouldeatiftheyobservedtheirfriendsbeinghealthy。Thesubjects，studentsfromtheuniversity，gotcolorcodedplates，andthefoodhadcolorcodedtoothpicks。Byobservingwhichtoothpickswereleftonwhichplatesthescientistscouldleavetheroom，letthestudentsbehavecompletelynaturally，andthenfigureoutwhoatewhatafterthestudentsleft。
　　Afterthefirstgroupleft，theresearchersenteredthelabandfoundthatboththeplatesandthetoothpickshadbeengatheredupandconsideratelythrowninthetrash。Allthey’dmanagedtododuringthefirstexperimentwasfeedthreestudents。
　　Theresearcherstookthetrashcanoutoftheroom，andwelcomedthenextsetofsubjects。Theyplannedtocomebackafteraperiodoftimethatwouldgivethestudentsplentyoftimetoeatandworkontheirproject。Beforetheycouldreturntotheroom，theyheardsomeonecallingthem。Astudenthadcomelookingforthem，alltheplatesandtoothpicksjumbledtogetherinherhands，askingwherethetrashcanwassoshecouldthrowtheplatesandtoothpicksaway。
　　Afterthat，theresearchersstartedtellingthestudentstojuststayintheroomuntiloneofthescientistscametogetthem。Afterthenextexperiment，thescientistcameintofindalltheplatesandtoothpicks，piledinaneatstackatthecenterofthe。
　　Eventually，theresearchersrealizedtheyhadnochoicebuttocrouchneartotheroomandinterruptthestudentsaftertheyhadfinishedthedummyprojecttheywereworkingon，butbeforetheycouldstarttryingtohelptheexperimentersbycleaningupafterthemselves。Finally，theycouldstartcollectingdata。
　　Theremustbesomeresearchersreadingthiswhohavehadexperiments，especiallyexperimentsinvolvinghumans，veeroffcourseinsillyways。Tellushowyourexperimentwashijackedbyaccident，misadventure，orwellmeaningMinnesotans。