Time spent during sketch map creation might correspond to the richness of details depicted in the sketch map, the difficulties encountered due to the lack of experience (i.e. unfamiliarity of the task and with the drawing tool), or remembering issues. Since the average drawing time of experts is greater than of novices, some experts spent the longest time for the task. Extreme values occurred in expert group can be explained by the richness of main structuring elements on the sketch maps. These sketch maps were detailed, contained larger amount of structuring elements and scored higher than the average among their group. Unlikely in expert group, there was more balanced trend in novices (Figure 19).However, within one-third time of experts, some novices –those who spent the longest time- got equal scores as experts did with their sketch maps.