Size is one of the most effective visual variables in terms of its selectiveness, associativity, easiness of perception as ordered. Larger elements can be perceived immediately compared to smaller ones [2].
For scoring the sizes of drawn elements, we counted on relative sizes on the sketch maps. If the size of an element is considerably logical within its surrounding elements, we accepted it as correct size depiction. According to size scores, experts drew map elements 7.8% better than novices did considering their size and based on two-way ANOVA, this performance difference was significant, F(1,55)= 4.760, p=0.034. The biggest difference occurred in settlements (14.3%) (Figure 9). The possible explanation would be that the depiction of settlements requires higher-level generalization knowledge. Since individual buildings come together to form a settlement or village, aggregation is needed to define a group of buildings as settlements.