“…With respect to research approach, studies can be classified according to the type of research process used: qualitative, quantitative, or mixed 67 . Studies were primarily qualitative in nature estudios 28,[31][32][33][34][35][36]38,41,[47][48][49][50][51]55,56,60,[63][64][65][66] , followed by quantitative studies 27,30,37,39,40,[42][43][44][45][46]54,57,58 , with mixed methods research accounting for only a small proportion of the total number of studies 29,52,53,59,61,62 . An analysis of the selected articles by country and research approach shows that studies from core countries used predominantly quantitative approaches, while those from periphery countries tended to adopt qualitative research designs.…”