Unstructured and semi-structured interviewing.

@article{Rose1994UnstructuredAS,
  title={Unstructured and semi-structured interviewing.},
  author={Karen E Rose},
  journal={Nurse researcher},
  year={1994},
  volume={1 3},
  pages={23-32}
}
At first glance, the idea of collecting data through some kind of interviewing can seem an attractively easy one; it is just talking to people, asking questions and recording the answers. The would-be researcher quickly discovers, however, that interviewing can be a complex and daunting undertaking.