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The '''extended parallel process model''' ('''EPPM''') is a fear appeal theory developed by communications scholar [[Kim Witte]] that illustrates how individuals react to fear-inducing messages.<ref>{{cite journal | vauthors = Witte K | title = Putting the fear back into fear appeals: The extended parallel process model. | journal = Communications Monographs | date = December 1992 | volume = 59 | issue = 4 | pages = 329–349 | doi = 10.1080/03637759209376276 }}</ref> Witte subsequently published an initial test of the model in [[Communication Monographs]].<ref>{{cite journal | vauthors = Witte K | title = Fear control and danger control: A test of the extended parallel process model (EPPM). | journal = Communications Monographs | date = June 1994 | volume = 61 | issue = 2 | pages = 113–134 | doi = 10.1080/03637759409376328 }}</ref>
The EPPM was developed by Witte as a response to the significant inconsistencies in fear appeal literature, serving as an extension of previous fear appeal models, hence the use of 'extended' in name 'EPPM'. The model is originally based on Leventhal's Parallel Process Model – a danger and fear control framework that studied how adaptive protective behaviour stemmed from attempts of danger control.<ref name=":1">{{cite journal | vauthors = Leventhal H | title = Fear appeals and persuasion: the differentiation of a motivational construct | journal = American Journal of Public Health | volume = 61 | issue = 6 | pages = 1208–1224 | date = June 1971 | pmid = 4110702 | pmc = 1529874 | doi = 10.2105/AJPH.61.6.1208 }}</ref> It also significantly draws from Roger's [[Protection motivation theory]], which proposes two responses to fear-inducing stimuli: threat appraisal and coping appraisal.
The model's main theory is that when confronted with a fear-inducing stimulus, humans tend to engage in two simultaneous ways of message processing: a perceived efficacy appraisal ([[cognitive processing]]) and a perceived threat appraisal (emotional processing). Differences in message appraisal then lead to two behavioural outcomes, with individuals engaging in either a danger control process or a fear control process. In the case of the message being perceived as having no element of threat, individuals do not exhibit a response, and the message is ignored. The EPPM states that the danger control process leads to behavioural change, while the fear control process does not.
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Witte's motivations for designing an updated fear appeal model was due to the declining role of fear in fear appeals. While initially, fear was the pinnacle of theoretical fear appeal literature, it was starting to be considered as a [[control variable]] in subsequent models. A lack of precision in the Parallel Process Model and empirical inconsistencies in the Protection Motivation Theory were also noted by Witte as reasons for formulating an extended parallel process model.
Two main components of large-scale public messaging that induce behavioural change are fear appeals and fear appraisals. [[Fear appeal|Fear appeals]] are specifically designed to elicit fear and nudge individuals to adapt to the recommendations in the message. They find their use in public health campaigns and political adverts
* Message: The content that is included in the fear-inducing message
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