Abstract

This paper deals with some aspects of the difficulties encountered by subjects (students of engineering, industrial apprentices, miners) drawn from traditionally non-pictorial cultures when dealing with technical drawings and their derivatives. It presents a series of experiments involving impossible figures as well as a study concerned with interpretation of Geometrical diagrams. The results indicate that the difficulties encountered do not arise from an inability to perceive a pattern of lines as representing a solid object but rather from the inability to arrive at a correct percept of the depicted object.

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