Use the FOIL method to cross-check.
The calibration of the device is performed using multiple methods to cross check each other.
However, assessment tools were designed to draw on multiple sources of information and assessment team members trained to cross-check responses to ensure that findings presented are as accurate as the research methods allow.
We collected archival information to cross-check the interviews.
To cross-check the accuracy of the Rietveld analysis, standard additions of amorphous alumina were performed.
Focus group discussion was carried out to cross-check and validate the answers from respondents.
The discussions provided opportunities to cross-check and validate data (Creswell 2009).
The reason to have an additional group was to cross-check some of our findings in patients that differed in terms of administration (paper vs. computer) and recruitment method (physician instead of internet).
It allows us to cross-check collected information and to build up a database of signals.
Three analysts independently performed the analyses to cross-check results (see Authors' Contributions).
