A quick Google search yielded these to get you started. I didn't see anything about symmetry of toilet paper rolls, however.
SYMMETRY PREFERENCEAS A COGNITIVE BY-PRODUCT IN STARLINGS by JOHN P. SWADDLE1), JUDY P.K. CHE and R. EARL CLELLAND2) (Institute for Integrative Bird Behavior Studies, Biology Department, College of William & Mary,Williamsburg,VA 23187-8795, USA) http://jpswad.people.wm.edu/BEH2297.pdf Symmetry activates extrastriate visual cortex in human and nonhuman primates Yuka Sasaki*†, Wim Vanduffel*, Tamara Knutsen*, Christopher Tyler‡, and Roger Tootell* http://www.pnas.org/content/102/8/3159.full.pdf Symmetry is in the eye of the ‘beeholder’: innate preference for bilateral symmetry in flower-naïve bumblebees Ivana Rodríguez1, 2, Andreas Gumbert1, Natalie Hempel de Ibarra1, Jan Kunze1 and Martin Giurfa3 PDF (156.3 KB) HTML Free Preview Now back to my test...sigh. Carol Carol DeVolder, Ph.D. Professor of Psychology Chair, Department of Psychology St. Ambrose University Davenport, Iowa 52803 phone: 563-333-6482 e-mail: [email protected] --- To make changes to your subscription contact: Bill Southerly ([email protected])
