“…A wealth of literature demonstrates that /s/ is variable both in terms of its socioindexicality (Campbell-Kibler, 2011; Levon, Maegaard, & Pharao, 2017; Munson, McDonald, DeBoe, & White, 2006; Podesva & Van Hofwegen, 2015; Stuart-Smith, 2007; Zimman, 2017) and phonological conditioning (Baker, Archangeli, & Mielke, 2011; Stevens & Harrington, 2016), which likely underlies the general observation that /s/ shows a large degree of interspeaker variation (e.g., Newman et al, 2001; Kraljic & Samuel, 2007; Stuart-Smith et al, 2020). Few prior studies have examined both socioindexical and phonetic factors as sources of /s/ variability together, so here we consider each in turn, followed by a closer examination of /stɹ/.…”