I came across this really novel method called a questerview. Its not even in the dictionary!!! Basically what it is is the combination of questionnaires (e.g. the kind used in quantitative studies) and interviews (e.g. the kind used in qualitative research). How it works is that respondents are tape-recorded as they complete a questionnaire and are asked questions relating to their understanding of the terms in the questionnaire. The data collected from questerviews would be so informative and rich compared to questionnaires alone.
So what a neat idea for strengthening a study against validity threats and using qualitative and quantitative methods in tandem. This idea is just brilliant if you ask me.
Check out this site for more details:
Hope you enjoy it as much as I did.