“…While much research in HRI toward this goal has focused on the effects of robot appearance and observable behavior, a significant aspect of natural HRI is communication in natural language (e.g., Scheutz, Schermerhorn, Kramer, & Anderson, 2007), which has only recently received significant attention. Recent research has investigated various social aspects of natural language interactions with robots, such as politeness (e.g., , turn taking (e.g., Nadel, Revel, Andry, & Gaussier, 2004), affective speech (e.g., Scheutz, Schermerhorn, & Kramer, 2006), dialogueappropriate facial movements (e.g., Liu, Ishi, Ishiguro, & Hagita, 2012), pragmatic analysis (e.g., Williams, Briggs, Oosterveld, & Scheutz, 2015), and collaborative control (e.g., Fong, Thorpe, & Baur, 2003).…”