Twenty-four braille readers (grades 4-12) performed a line-tracking task on tactile line graphs which differed in the type of raised line used to represent the data curves and natures of the display backgrounds. Grids impaired the trackability of every line tested, while line type and grade level had only marginal effects. (Author/CL)

Thirty-six braille students (grades 4 through 12) were asked to inspect a tactile display consisting of nine removable symbols. Students in the lower grades benefited most from the systematic searching training and were superior to the control group in the same grades. (Author)

Two experiments with a total of 92 elementary grade blind students were conducted to determine the effects of training blind students in shape recognition accuracy and speed and accuracy of locating shapes on a tactile map by using a distinctive features analysis strategy and line tracing. (Author/DB)

Seventy-two blind braille students in grades 4 through 12 were given map reading tasks on tactile pseudomaps which either contained texture (noisy map) or didn't (noise-free map). (DB)