Research Article
PERCEPT Indoor Navigation System for the Blind and Visually Impaired: Architecture and Experimentation
Table 1
Population for Phase I trials.
| Field | Response | Number of subjects |
| Gender | Male | 6 | Female | 4 |
| Race | Caucasian | 8 | Hispanic | 2 |
| Age ( in years ) | age < 20 | 0 | 20 age < 30 | 2 | 30 age < 40 | 2 | 40 age < 50 | 1 | 50 age < 60 | 3 | 60 age < 70 | 1 | 70 age < 80 | 0 | 80 age < 90 | 1 |
| Highest education level | GED/high school | 2 | Some college | 4 | College+ | 4 |
| Members in household | 1 | 4 | 2 | 3 | 3 | 1 | 4 | 1 | 5 | 0 | >5 | 1 |
| Level of blindness | Blind | 6 | Partial vision | 4 |
| Blind since birth | Yes | 4 | No | 6 |
| Navigation aid | Cane | 7 | Guide dog | 3 | No mobility aid | 0 |
| Received O&M training | Yes | 10 | No | 0 |
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