Kang, Seokhan. 2013. The phonetics and phonology of emphatic reduplicaton: A case study of Jeju Korean. Studies in Phonetics, Phonology and Morphology. 19.1. 3-32. 

Reduplication patterns of Jeju and Seoul Korean are noteworthy in that they are similar but still distinct in both quality and quantity. The emphatic forms of Jeju Korean pursue the identity avoidance between base and reduplicant in a reduplicative template, through alternating vowels, consonants, and features. The identity avoidance is created by the cooperation of universal grammar of perception and localized grammar of production. This process of negotiation between two grammars is motivated in forming emphatic reduplication of Jeju Korean. The motivation should be considered as the interface between production and perception, in which the perceptual distance such as maximizing differences of formant, duration, and F0 triggers particular phonotactic grammars such as raising and fronting in vowels as well as deletion, addition, tensification, and aspiration in consonants. (Seoul National University)