Tactual Distinctive Features Analysis: Training Blind Students in Shape Recognition and in Locating Shapes On a Map

Abstract

Two experiments 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. In Experiment 1, training significantly improved the shape-recognition performance of a group of 25 trained braille readers, as compared to a matched group of 25 untrained braille readers. In Experiment 2, 21 trained students (as compared to a matched group of 21 untrained students) showed a significant increase in the number of shapes located and a significant decrease in the average time to locate a shape on a tactile map. Results are discussed in terms of the critical importance of training blind students to be analytical, systematic, and complete in exploring tactile materials so as to ensure adequate development of their perceptual-conceptual abilities.