The report describes the development and evaluation of an instructional program in tangible graph interpretation for braille readers. Because graphs frequently appear in textbooks and in other printed sources, lack of appropriate translation for blind persons can be a significant educational obstacle. Based on anlyses of typical graph reading…

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)