Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Proportion of visually impaired and dual-impaired participants who could complete at least one of the tasks without mistakes. Success increased with increasing volume and with increasing repetition; however, overall success rates were extremely low and never exceeded 40%. 1× = one stimulus presentation; 4× = four stimulus presentations; DSI = dual sensory impairment; VI = visual impairment.
