Provenance Kim Kastens created the annotated version of the figure. The underlying colored data representation came from http://www.ldeo.columbia.edu/~kastens/curriculum/maptutorial/01_About_Spatial... by Kastens & Ishikawa. The data themselves came from Vandenberg, S. G., & Kuse, A. R. (1978). Mental rotations, a group test of three-dimensional spatial visualization. Perceptual and Motor Skills, 47, 599-604.
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