Before conducting the experiment, each participant was tested for his or her geo-spatial sensing ability with a well organized questionnaire as shown in Table 2, which was devised by Takeuchi [11, 12] to judge sense of direction. We let them answer the questionnaire, because we wanted to recognize subjective of each participant. The questionnaire was composed of 20 questions, which each one has five phases of scores from 0 to 5; thereby the total score will be in the range of 20 to 100. As a result, in average, the male group (D~F) achieved a score 78.3, and the female group (A~C) scored 49.3. However, this result shows not necessarily the ability of each participant accurately