“…For instance, preschoolers use the geometrical information in simple twodimensional maps to orient themselves in a three-dimensional environment (Shusterman et al, 2008). However, educational psychological studies carried out in different countries and for different age groups revealed that geometrical shape recognition is not trivial and depends on the shape exemplars used (Clements & Battista, 1992;Clements, Swaminathan, Hannibal, & Sarama, 1999;Kouba et al, 1988;Usiskin, 1987). Younger children seem to progress from an early phase, when they categorize shapes according to their resemblance to a prototype, to the adult-level of knowledge when they use abstract rules for categorization (Satlow & Newcombe, 1998).…”