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1、SocIndicResDOI10.1007/s11205-007-9143-1UnderstandingandUsingMediatorsandModeratorsAmeryD.WuÆBrunoD.ZumboAccepted:14May2007ÓSpringerScience+BusinessMediaB.V.2007AbstractMediationandmoderationaretwotheoriesforrefiningandunderstandingacausalrelationship.Empiricalinvestigationofmedi
2、atorsandmoderatorsrequiresanintegratedresearchdesignratherthanthedataanalysesdrivenapproachoftenseenintheliterature.Thispaperdescribedtheconceptualfoundation,researchdesign,dataanalysis,aswellasinferencesinvolvedinamediationand/ormoderationinvestigationinbothexperimentalandnon-
3、experimental(i.e.,correlational)contexts.Theessentialdistinctionsbetweentheinvestigationofmediatorsandmoderatorsweresummarizedandjuxtaposedinanexampleofacausalrelationshipbetweentestdifficultyandtestanxiety.Inaddition,themoreelaboratemodels,moderatedmediationandmediatedmoderatio
4、n,theuseofstruc-turalequationmodels,andtheproblemswithmodelmisspecificationwerediscussedconceptually.KeywordsMediatorModeratorModeratedmediationMediatedmoderationCauseandeffectStructuralequationmodelExperimentaldesignThemethodologyofmediationandmoderationiscommonlyusedinso
5、cialscience,health,psychological,educational,andsociologicalresearch.Thepurposeofthispaperistoprovideanup-to-datereviewoftheconcepts,uses,andmethodologyofmediationandmoderation.Theexamples,notation,andstatisticaldemandsarepurposefullybroadandeasilyaccessible,involvingseveraldif
6、ferentdisciplines,soastocaptureaswideanaudienceofreadersaspossible.Likewise,webeginwithconceptualmattersandmattersofresearchdesignsoastocleargroundofmanyoftheseconfusingfoundationalideasbeforemovingtothestatisticalideasthatbuildfromthesefoundations.Mediationandmoderationaretheo
7、riesforrefiningandunderstandingacausalrela-tionship.They,inessence,areresearchers’hypothesesabouthowacauseleadstoanA.D.WuB.D.Zumbo(&)DepartmentofECPS,UniversityofBritishColumbia,ScarfeBuilding,2125MainMall,Vancouver,BC,CanadaV6T1Z4e-mail:bruno.zumbo@ubc.ca123A.D.Wu,B.D.Zumboeff
8、ect.Theinvestigationofmediationandmoderationeffectsdem