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This paper presents a computer game developed to apply the qualitative model for describing 3D objects (Q3D) using depth and different perspectives. The Q3D-Game shows how to build objects out of cubes; and how the top, front and lateral views of an object can be extracted. It also explains the differences in depth in each perspective and relates them to the Q3D model. This knowledge is acquired by the system enabling it to infer perspective features of 3D objects by consistency checking. The Q3D-Game also motivates users while playing so that they train and improve their spatial abilities. These abilities are trained using tasks such as 3D object block building and answering questions from the Perceptual Ability Test (PAT, part IV) which measure intelligence in humans. The Q3D-Game testing process by humans is currently in progress.
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