Grounded theory has its roots in sociology. Its goal is to inductively build a theory about a practice or phenomenon using interviews and observation as the primary data-collection tools. This emphasis on theory distinguishes it from other qualitative approaches. Glaser and Strauss (1967) developed grounded theory as a way offormalizing the operations needed to develop theory from empirical data. However, the two eventually disagreed and founded two fundamentally different approaches to grounded theory: Glaser's version and the Strauss and Corbin version. Jones and Alony (2011) compare the two approaches (Table 16.2).Charmaz (2014) added a constructivist approach to grounded theory that has its own approach to coding that is discussed later in this chapter.