My experience from interdisciplinary research is based on the exploitation of studies of related branches of science that serve as auxiliary sciences to the major branch of science. In the course of study of more complex phenomena of folk culture one needs to research into their origin (not their typological development). The most limiting factor, from my point of view, is ethnographical regionalisation and the established borderlines of regions and countries. Another limiting factor is a close cohesion with the established understanding of branch-specific sources of information and methods, particularly physical preservation of
ethnographic artefacts. The significance of training in auxiliary sciences for multiaspect studies is described via six examples from the author’s own study of wooden multi-aspect in Europe. Having combined aspects from several disciplines, the author managed to come up with new perspectives with respect to various issues of origins of well-known phenomena. The result was an attempt to synthesise a phenomenon the genetics of which can be examined in broad interethnic contexts only. Each and every synthesis does indeed answer the research questions, but it also asks new questions for further researches to answer. It is therefore necessary to prepare accordingly, with respect to these researches. interdisciplinary studies require familiarisation with analytical methods in related branches of science. Education of experts in ethnology could be extended to include the study of auxiliary sciences, as is the case of the auxiliary sciences of history.