Table 2 Aggregated count of participants’ ratings of the difficulty of detecting various obstacles
Obstacle | Difficulty of detection | ||||
|---|---|---|---|---|---|
Very easy | Easy | Neutral | Difficult | Very difficult | |
Ascending stairs | 5 | 1 | 0 | 2 | 2 |
Descending stairs | 2 | 1 | 4 | 1 | 2 |
Moving obstacles | 5 | 0 | 1 | 0 | 4 |
Very small obstacles | 1 | 0 | 1 | 0 | 8 |
Walls | 7 | 0 | 2 | 0 | 1 |
Chairs/tables | 3 | 1 | 6 | 0 | 0 |
People | 5 | 3 | 0 | 1 | 1 |