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)

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)