“…Theoretically, she drew on two primary models of social interaction: (a) normative behavior in public space (Goffman, 1971) and (b) telephone interactions (Hopper, 1992). As with other early work on mobile phones (e.g., Hoflich, 2005Hoflich, , 2006aHoflich, , 2006bIto, Okabe, & Matsuda, 2005;Lasen, 2003), Humphreys was interested in how mobile phones change peoples' interactions within public space. She writes, "Together, Goffman and Hopper provide models for understanding the introduction of cellphones into public spaces-specifically, how the technology may influence normative social interaction, as well as how traditional landline phone use may change when phones can be used in more public contexts" (2005, p. 812).…”