Diagram describing texts are integral part of science and engineering subjects including geometry, physics, engineering drawing, etc. In order to understand such text, one, at first, tries to draw or perceive the underlying diagram. For perception of the blind students such diagrams need to be drawn in some non-visual accessible form like tactile…

This study evaluated the effects of three instructional methods (direct experience, cartographic representation (tactile map), and verbal description) on the spatial knowledge of 30 adults with blindness. Results indicated that participants' practical spatial knowledge was better when they learned with a tactile map than in either of the other…