In this section, the design and methodology of the experiment is summarized. Possible confounds caused by those design decisions and how those decisions might have impacted the validity of results are discussed in Section 7.7 .
Legally blind adult subjects were recruited from a list solicited from two Orientation and Mobility instructors who worked in the area. A full description of the process was reported (see Section 1.6.1 , Subject Recruitment and Procedures ).
The concepts tested and the questions asked were largely taken from what had been learned from earlier experiments, from other researchers, and from discussions with blind travelers, as reported in the second chapter. A large battery of questions was asked to take full advantage of the subjects’ knowledge and input.
A field test was used to acquaint the subjects with Remote Infrared Audible Signage. Subjects were tested in two conditions, with and without RIAS. Most questions were asked before the test and then after the test. Some questions were asked after each of the two field trials and some questions were asked only after the test.
| BACK TO OVERVIEW |
BACK TO TABLE OF CONTENTS
|
NEXT SECTION |