“…A less common but increasingly frequent method for describing /s/ variation relies on measurements of the acoustic properties of fricative moments, leaving aside the question of segmental categories (Minnick Fox 2006, Erker 2010, File-Muriel and Brown 2011. Despite this methodological variability in the description of /s/ weakening, the research literature converges in demonstrating that it is systematically constrained by a range of linguistic factors, 5 including preceding and following segments (Ma and Hirashimchuk 1975, Alba 2000, File Muriel 2007, Lynch 2009), word-position and speech rate (Hammond 1980), prosodic context (Poplack 1981, Alfaraz 2000, Brown and Cacoullos 2003, lexical frequency (Bybee et al 2016, Erker andOtheguy 2016), and morphemic status and other functional considerations (Terrell 1975a1979, Poplack 1980b, Uber 1981, 1989, Hochberg 1986, Hundley 1987, Ranson 1992, Cameron 1996.…”