t a r r l a b

Single Geons

(.zip archive) This image set contains 10 single part objects ("Geons"). Each object is qualitatively different from the others in the set. Objects were modeled after those in Biederman and Gerhardstein's (1993) JEP:HPP article. The set includes rotations in depth around the vertical axis of 0, 45, and 90 deg (labeled A, B, and C). One nice property is that the 0 to 45 deg rotations show the same visible image features, but the 45 to 90 deg rotations show qualitatively different image features. This allows a comparison between equal magnitude rotations with differing degrees of qualitative change. See Hayward and Tarr's (1997) JEP:HPP article for an experiment using these objects and more on this topic.

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