In order to investigate to what extent perceptual factors affect the borrowing process, we examined the borrowing of English obstruents in Korean by comparing loanword adaptation patterns with the natives’ P-map (Steriade, 2001b). The orthographic classification technique was used to obtain the P-map (e.g., Wiik, 1965; Schmidt, 1996); 40 native Koreans were asked to choose the best matching Kor...