Table 2.
A sorted list of the criteria defined by the blind experts while answering the question: “Please list up to five biggest problems (in diminishing order) you experience when orientating/navigating indoors (e.g., public places, at home, etc.)?”
| No. | Criteria | ni | Meani | Sum of Grades | Weighting Rate (Wi) |
|---|---|---|---|---|---|
| 1 | 35C#3: Find room by number | 15 | 4.07 | 61 | 0.642 |
| 2 | 35C#1: Find elevator | 6 | 3.67 | 22 | 0.083 |
| 3 | 35C#7: Read number in bank | 5 | 3.60 | 18 | 0.056 |
| 4 | 35C#2: Find stairs | 6 | 3.00 | 18 | 0.056 |
| 5 | 35C#17: Object recognition | 3 | 4.67 | 14 | 0.034 |
| 6 | 35C#4: Find entrance | 5 | 2.60 | 13 | 0.029 |
| 7 | 35C#11: Detect obstacles | 4 | 3.25 | 13 | 0.029 |
| 8 | 35C#5: Find exit | 6 | 1.83 | 11 | 0.021 |
| 9 | 35C#15: Steps and trip hazards | 2 | 5.00 | 10 | 0.017 |
| 10 | 35C#8: Large open space | 2 | 4.50 | 9 | 0.014 |
| 11 | 35C#12: Find goods in supermarket | 3 | 2.67 | 8 | 0.011 |
| 12 | 35C#18: Text recognition | 2 | 3.50 | 7 | 0.008 |
| 13 | 35C#10: Landmark in large space | 1 | 5.00 | 5 | 0.004 |
| 14 | 35C#16: Find recycle bin | 1 | 5.00 | 5 | 0.004 |
| 15 | 35C#19: Find corridor | 1 | 5.00 | 5 | 0.004 |
| 16 | 35C#20: Find cash desk | 2 | 2.50 | 5 | 0.004 |
| 17 | 35C#14: Other people | 1 | 4.00 | 4 | 0.003 |
| 18 | 35C#9: Accurate distance to location | 1 | 3.00 | 3 | 0.002 |
| 19 | 35C#6: Finding toilet (WC) | 1 | 1.00 | 1 | 0.000 |
| 20 | 35C#13: find escalator | 0 | 0.00 | 0 | 0.000 |
| Total: | 232 |