Grounded theory is a qualitative research method that aims to generate a theory from data collected in a study. The researcher does not begin with a hypothesis, but allows themes and theories to emerge from the data through a process of open, axial, and selective coding. There are two dominant grounded theory designs - the emerging design emphasizes avoiding preconceptions, while the systematic design uses coding steps to develop a logic paradigm. A constructivist approach looks at participants' perspectives rather than just describing facts. Grounded theory is used when existing theories are inadequate or nonexistent to explain a process.