subject     floorplan      tech       maperror
# Subjects view four different building floor plans, using
# four different technologies (map, crude virtual envirnoment,
# photorealistic virtual environment, actual visit).  Then
# subjects are asked to draw maps and place landmarks.  
# Response is map error for landmarks.  Each subject uses
# each technology once and each floor plan once.
# Synthetic data based on an experiment of Amy Kalia.  
            1            1            1         1.77
            1            2            2         8.96
            1            3            3        10.11
            1            4            4         3.42
            2            2            1         3.27
            2            1            2         9.21
            2            4            3         4.42
            2            3            4         3.79
            3            3            1         6.66
            3            4            2         5.41
            3            2            3        21.28
            3            1            4        14.92
            4            4            1         3.28
            4            3            2         1.72
            4            1            3         5.15
            4            2            4         5.71
            5            1            1         8.92
            5            2            2         12.9
            5            3            3         5.79
            5            4            4         5.44
            6            2            1         2.28
            6            3            2          4.2
            6            4            3         4.46
            6            1            4         3.07
            7            3            1         5.87
            7            4            2         6.18
            7            1            3         8.76
            7            2            4         6.51
            8            4            1         2.07
            8            1            2         8.46
            8            2            3         6.27
            8            3            4         3.41
            9            1            1         3.29
            9            2            2          5.4
            9            3            3          4.4
            9            4            4         3.21
           10            2            1         7.87
           10            4            2         5.99
           10            1            3        13.35
           10            3            4         4.64
           11            3            1         0.18
           11            1            2         9.66
           11            4            3         4.13
           11            2            4         7.74
           12            4            1         2.61
           12            3            2         7.52
           12            2            3        10.54
           12            1            4        13.38
           13            1            1         5.59
           13            2            2         5.85
           13            3            3         2.19
           13            4            4          2.5
           14            2            1         8.43
           14            1            2         6.32
           14            4            3         6.42
           14            3            4         8.07
           15            3            1         3.73
           15            4            2         3.71
           15            1            3         6.72
           15            2            4         2.52
           16            4            1         0.06
           16            3            2         0.51
           16            2            3         4.83
           16            1            4         1.07