The challenge of data collection in mixed methods relates to the unique skills required for each method,
and the need for flexibility within a mixed method framework. The tendency in health services research
for data collection to be delegated to junior researchers needs careful consideration in mixed methods, particularly
where data collection is truly integrated. For example, skilled interviewers are required where an interview schedule includes a qualitative topic guide and interviewer- and/or self-administered instruments. These skills relate to an understanding of the data quality requirements of each paradigm, managing the content and flow of complex research interviews, working flexibly and monitoring respondent expectations and burden. These are in addition to the particular sensitivities and empathy required of palliative care researchers working with vulnerable patients, often in their own
homes