J.R. Martin and P.R.R. White's approach to appraisal regionalised the concept into three interacting domains: 'attitude', 'engagement' and 'graduation'.[1] Each of these has various sub-systems; for example, 'attitude' includes 'affect' (expression of emotion), 'appreciation' (evaluation of things/entities), and 'judgement' (evaluation of people and their behaviour), with different choices within these sub-systems.[1] In the case of 'affect', for instance, these more delicate choices relate to different types of emotion.[1][6] However, there is debate about the different sub-systems that should be recognised, and various researchers have since suggested modifications of the initial description.[7][6]
The analysis of appraisal has also become influential outside Systemic Functional Linguistics, in various types of discourse analysis.[8]
^Hunston, Susan (2011). Corpus approaches to evaluation: Phraseology and evaluative language. New York. ISBN978-0-415-83651-7. OCLC823552375.{{cite book}}: CS1 maint: location missing publisher (link)
^DuBois, John (2007). "The stance triangle". In Robert Englebretson (ed.). Stancetaking in Discourse: Subjectivity, Evaluation, Interaction. John Benjamins. pp. 139–182. ISBN978-90-272-5408-5. Retrieved 10 May 2013.