Designation:E1885−04(Reapproved2011)StandardTestMethodforSensoryAnalysis—TriangleTest1ThisstandardisissuedunderthefixeddesignationE1885;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversaprocedurefordeterminingwhetheraperceptiblesensorydifferenceexistsbetweensamplesoftwoproducts.1.2Thistestmethodapplieswhetheradifferencemayexistinasinglesensoryattributeorinseveral.1.3Thistestmethodisapplicablewhenthenatureofthedifferencebetweenthesamplesisunknown.Itdoesnotdeterminethesizeorthedirectionofthedifference.Theattribute(s)responsibleforthedifferencearenotidentified.1.4Comparedtotheduo-triotest,thetriangletestcanachieveanequivalentlevelofstatisticalsignificancewithfewerassessors.Fordetailsonhowthetriangletestcomparestootherthree-sampletests,seeRefs(1),(2),(3)and(4).21.5Thistestmethodisapplicableonlyiftheproductsarehomogeneous.Iftwosamplesofthesameproductcanoftenbedistinguished,thenanothermethod,forexample,descriptiveanalysis,maybemoreappropriate.1.6Thistestmethodisapplicableonlywhentheproductsdonotcauseexcessivesensoryfatigue,carryoveroradapta-tion.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3E253TerminologyRelatingtoSensoryEvaluationofMate-rialsandProductsE456TerminologyRelatingtoQualityandStatisticsE1871GuideforServingProtocolforSensoryEvaluationofFoodsandBeverages2.2ISOStandard:ISO4120SensoryAnalysis–Methodology–TriangularTest43.Terminology3.1Definitions–Fordefinitionoftermsrelatingtosensoryanalysis,seeTerminologyE253,andfortermsrelatingtostatistics,seeTerminologyE456.3.2DefinitionsofTermsSpecificto...
