The debate regarding paradigms and investigation methods is at least partially responsible for the fragmentation of gerontologocial knowledge. First, the article presents arguments in favour of methodological pluralism as a research designed to facilitate the integration of knowledge and innovation. The main goal of methodological pluralism is to reconcile different approaches by combining a number of observation and data-collection scenarios within the same study. After presenting the arguments in favour of methodological pluralism and identifying the integration methods that can be applied to study results already obtained, the author proposes a taxonomy of multiple research strategies that may be utilized in the same study. He specifically discusses: pseudo-triangulation, parallel and sequential triangulation, composite methods, mixed methods and the multi-method approach.