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1、BriefIntroductiontotheTheoryofTriadicInfluenceFrankJ.Snyder,PurdueUniversityandBrianR.Flay,OregonStateUniversityUnpublisheddocument,August2012OriginoftheTheoryofTriadicInfluence(TTI)BeforedescribingtheTTI,itisusefultoputitintocontextbycoveringabriefhistoryofhealth-behaviortheory.Healt
2、h-behaviortheoryhasdevelopedfromresearchconductedbysocialpsychologists(Noar,2005).Inthe1950s,socialpsychologistssoughttounderstandbehaviorthroughthelensoftheoriessuchasStimulusResponseTheoryandCognitiveTheory(Janz,Champion,&Strecher,2002).ThemainclaimofStimulusResponseTheoryisthatindi
3、vidualslearnfromeventsandchangetheirbehavioraccordingly.TheassertionofCognitiveTheoryisthatbehaviorstemsfromthesubjectivevalueplacedonanoutcomeandtheexpectationthatanactionwillresultinaparticularoutcome.Severalprominentscientistsconductedtheresearchthatledtotheemergenceoftheseandother
4、relatedtheories.GodfreyHochbaumandIrwinRosenstockweresocialpsychologistswhoworkedfortheU.S.PublicHealthServiceduringthe1950sand60sandlaterpursuedacademiccareersinthebehavioralsciences.DuringtheiremploymentattheU.S.PublicHealthService,thesetworesearcherssoughttoexplainthefailureofindiv
5、idualstoparticipateindiseasepreventionprograms,suchasMycobacteriumtuberculosisscreeningprograms.ThisworkledtothedevelopmentoftheHealthBeliefModel,whichincludestheconstructsofperceivedsusceptibility,perceivedseverity,perceivedbenefits,perceivedbarriers,andcuestoaction.AlbertBandurasubs
6、equentlyaddedself-efficacy(Bandura,1977)totheHealthBeliefModel,effectivelydemonstratinghowtheoriescanchangeastheybecomesubjecttoadditionalscrutinyandempiricaltesting.Thisprogressionhasalsooccurredduringthedevelopmentofintrapersonaltheoriesthathavebeenappliedtohealthbehaviors,forexampl
7、e,theTheoryofReasonedAction(Fishbein&Ajzen,1975)anditscorollary,theTheoryofPlannedBehavior(Ajzen,1985).Frequently,thesetheories,alongwithinterpersonaltheoriessuchassociallearningtheory(Bandura,1977)andthesocialdevelopmentmodel(Catalano&Hawkins,1996;Hawkins&Weis,1985),sharetheoreticalc
8、onstr
