摘要：In this article, the authors examine claims that using more than one method in research automatically enhances validity. They argue that if the findings from different methods are the same this does not automatically prove the study is valid. It may show that the researchers looked only for evidence that supported the findings from one method. Complementarity of methods does not mean that different methods have to produce the same findings. That different methods work together as equal partners has to be demonstrated rather than assumed. A study of self-care in relation to people with diabetes is used to draw out some of the issues in the operationalisation of multiple method validation.
