“…This perspective might offer a possible explanation not only for the fact that the dihedral symmetry occurs so often in the sample studied but, also, for the relationship found between dihedral symmetry and the educational level variable. Thus, previous research gives evidence to the fact that as children advance to higher levels of education in the time period between the end of preschool and the beginning of primary education, this increases their graphical expressivity, drawing more pictorial elements [22,23] and with more complex shapes [14]. Arguably, the observation provided by this study in the sense that dihedral symmetries are more frequent and also more complex as the pictures of the children in the highest educational levels are considered, could be linked to the fact that the children in these levels need to extend their graphical expressivity and, to that end, they more often draw on their representation of motifs with dihedral symmetry, and, presumably, with more complex structures.…”