“…Dolores and Salgado (2009) agree that: "Variational thinking and language is the field in which the phenomena of teaching, learning, and communication of mathematical knowledge typical of variation and change are studied" (p. 65). Cabezas and Mendoza (2016) present a perspective in which they include within variational thinking: [...] the elaboration of strategies, forms of reasoning, elements and linguistic structures that allow the study and analysis of change and variation to be communicated, the objectives of variational thinking are oriented to develop thought structures that allow the identification, analysis, and interpretation, in a natural way, of situations related to change and, in turn, model and transform them into simpler ones" (p. 15). We conjecture that: perceiving, identifying, and characterising variation in different contexts is the fundamental object of variational thinking in accordance with contributions presented by Dolores and Salgado (2009).…”