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Cara Moran PSY198 What is the effect of angle orientation of 3D objects when attempting to decide between mirror images and non-mirror images? ABSTRACT This experiment investigates the three-dimensional mental rotation of objects. Previous experiments into this phenomena such as those conducted by Shepard (1975), found that the larger the angle the bigger the increase of subjects reaction time, this was also used as a basis for the hypothesis for this investigation. The theory of analog internal transformations was used to explain these results, in which subjects make an internal representation of the external object, and mentally rotate the object until it finds congruence with the second object. The results obtained conclusively supported the hypothesis as angles of 180° produced a significantly longer reaction time than angles of 60°. INTRODUCTION The issue of mental representation and three dimensional object representations has evoked considerable amounts of thought and theories. The principal theory described as investigating...

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