When is a circle not a circle? Why coins seem to change their shape

Rotate a circular coin, and it looks like an ellipse. In this pre-print, Jorge Morales, alongside Chaz Firestone (Johns Hopkins), address arguments made against a previous paper in which they demonstrated “perspectival similarity.” Here, they show how their critics ultimately come to agree with their own conclusions, coming down on one side of a philosophical debate dating back to the seventeenth century.

Read their research paper, “Empirical evidence for perspectival similarity,” at PsyArXiv Preprints.

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