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procedures included a review and evaluation of the notes for clarity, and to assess whether <br /> follow-up with the interviewee was necessary. An email was sent following the interview to <br /> thank participants for their time and outlining any follow-up actions. <br /> 2. Maintain a chain of evidence. Multiple sources of evidence are used to support the <br /> conclusions of this study. The chain of evidence links the initial research questions to <br /> the conclusions, and vice versa, the conclusions back to the research questions. <br /> 3. Record data. All interviews for this study were recorded on-site and field notes were <br /> taken during the interview. Following the interview, detailed notes were written up as <br /> soon as practicable, to capture in more detail specific observations and key components <br /> of the interaction. <br /> 3.9 Interview Protocol <br /> Yin (2018) describes interviews as an "essential source of case study evidence"because <br /> they allow the researcher to learn the "hows" and "whys" of human behaviors in regard to key <br /> events and activities. It is important for these events and activities to be interpreted through the <br /> eyes of the interviewees who can provide important insights and identify other sources of <br /> relevant evidence. (Burns 2000) The purpose of an interview protocol is to establish the rules <br /> and procedures that will be followed during the interview process. The interview protocol <br /> provides a formal conversational guide and outlines the main questions. These main questions <br /> were shared with the interviewees in advance of the interview. Yin (2018, p. 118) describes the <br /> two jobs of the researcher during the interview are: (a) following your own line of inquiry, as <br /> reflected in your case study protocol, and (b) verbalizing your actual (conversational) questions <br /> 78 <br />