The study examined the ability to estimate the number of dots in Braille symbols by 21 legally blind and 21 sighted adults. Results indicated that this task was difficult for both blind and sighted subjects with little improvement over trials. Errors of underestimation exceeded errors of overestimation. (DB)

In three experiments, sighted college students tried to learn the names of the first 10 symbols of the braille alphabet. In Experiments 1 and 2, visual examination of the symbols enhanced learning. In Experiment 3, similar results were obtained when standard size braille symbols were used during the study trials. (Author)

This study evaluated performance of blind (n=17) and sighted adults on a haptic numerosity task of braille symbols in which symbol size was varied. Although blind subjects performed better than seeing subjects, the rate of learning and patterns of errors were similar, except that blind subjects did better with standard than with enlarged symbols.…