||Cho, Hye-Sung. (2020). The correlation between bidirectional stress systems and ternary stress feet. The Linguistic Association of Korea Journal, 28(4), 77-101. Hyde (2008) defined bidirectional stress systems as binary systems with a mixed directional orientation. As a result, in odd-parity words, an internal lapse arises adjacent to a single isolated foot, which yields a sequence of a foot and an unparsed syllable, [(σ)σ(σ)(σ)], in the middle. This paper contends that to avoid the stranded syllable in the ternary stress configurations, bidirectional systems opt for one of their own parsing tactics: a ternary stress foot. This is in sharp contrast with unidirectional systems which parse a stray syllable at edges into a degenerate foot. This also leads us to infer that there is a correlation between bidirectional systems and ternary stress feet that should be captured so as to account for the existence of language-specific ternary stress foot-conditioned phonological and morphological operations which have bidirectional stress systems. This paper parses trisyllabic configurations into Internally Layered Ternary (ILT) stress feet which consist of a disyllabic foot with a left- or right-weak adjoined syllable, as proposed by recursive foot theories (Bennett, 2012; Martínez-Paricio, 2012; Kager, 2012).