“…In this paper Bratman refers to a collaborative activity as a shared cooperative activity (SCA) and identifies three critical features of collaborative activity (or an SCA): commitment to the joint activity (CJA), mutual responsiveness (MR), and commitment to mutual support (CMS). Bratman's theory and his later related work (Bratman, 1993(Bratman, , 1997(Bratman, , 1999) have influenced research in a variety of fields including psychology (Alonso, 2009;Knoblich, Butterfill, & Sebanz, 2011), sociology (Pellizzoni, 2001;Tomasello, 2006), computer science (Jennings, 1996;Panzarasa, Jennings, & Norman, 2002), and computational linguistics (Lochbaum, 1998).…”