Fig. 1
From: On the dialectal variations of voiced sibilant /dz/ in Taiwan Min young speakers
An illustration showing the sound change process of /dz/ proposed by Ang 洪惟仁 (2003, 2012). The solid arrows indicate internally motivated sound changes while the dashed arrow indicates an externally motivated sound change [cf. Hickey (2012)]. Sounds surrounded by a single-dotted square are variants attested in the literature. The double-dotted square signals currently the most preferred sound variant. The block arrow indicates external language influence. Please see text for explanation