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Two deaf-blind subjects, a man and a woman, were used during two different sessions.
Each deaf-blind subject stood at a corner, holding up one of the cards shown below to solicit aid to cross the street.
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Three interviewers waited at strategic locations, ready to interview people who passed by or guided the subject across.
After getting assistance to cross, the subject entered a nearby store, waited a few minutes while the interviews were completed and the sidewalk cleared, then approached the corner to solicit aid to cross back again.