“…For this to happen, one method must inluence in some way the objectives, sampling, data collection, analysis, or interpretation of the other method within the study (O'Cathain, Murphy, & Nicholl, 2007). Within mixed methods intervention evaluations, the expectation is that the qualitative research should help to optimize the intervention to be trialed, improve the eiciency and ethics of the trial conducted, increase the internal validity of the trial by ensuring the right outcomes are measured in the right way, help interpret trial results, or facilitate the transferability of the trial indings to contexts outside the trial (O'Cathain et al, 2013).…”