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H. Keith Melton and Robert Wallace
4.4 on Amazon
1 HN comments

Clinical Microbiology Made Ridiculously Simple
Mark T. Gladwin
4.7 on Amazon
1 HN comments

Honeybee Democracy
Thomas D. Seeley
4.7 on Amazon
1 HN comments

The Hidden Spring: A Journey to the Source of Consciousness
Mark Solms
4.6 on Amazon
1 HN comments

Lehninger Principles of Biochemistry
David L. Nelson
4.4 on Amazon
1 HN comments

The Nature of Oaks: The Rich Ecology of Our Most Essential Native Trees
Douglas W. Tallamy
4.8 on Amazon
1 HN comments

Ten Stupid Things Women Do to Mess Up Their Lives
Laura C. Schlessinger
4.6 on Amazon
1 HN comments

How the Brain Works: The Facts Visually Explained (How Things Work)
DK
4.8 on Amazon
1 HN comments

Flourish (A Visionary New Understanding of Happiness and Well-Being)
Martin E.P. Seligman
4.4 on Amazon
1 HN comments

How the Brain Learns
David A. Sousa
4.7 on Amazon
1 HN comments

Plague: One Scientist's Intrepid Search for the Truth about Human Retroviruses and Chronic Fatigue Syndrome (ME/CFS), Autism, and Other Diseases
Kent Heckenlively and Judy Mikovits
4.7 on Amazon
1 HN comments

Passport to Magonia: From Folklore to Flying Saucers
Jacques Vallee
4.8 on Amazon
1 HN comments

Revolt Against the Modern World
Julius Evola
4.7 on Amazon
1 HN comments

Pattern Recognition and Machine Learning (Information Science and Statistics)
Christopher M. Bishop
4.6 on Amazon
1 HN comments

There's No Such Thing as Bad Weather: A Scandinavian Mom's Secrets for Raising Healthy, Resilient, and Confident Kids (from Friluftsliv to Hygge)
Linda Åkeson McGurk
4.8 on Amazon
1 HN comments
barikonApr 20, 2012
I've tried to find the original scientific research myself and have concluded that it does not exist. I'm not the only one who has come to this conclusion either. [1] I would love to be corrected on this matter though. These days, I tend to use the following instead, which also matches my intuition about learning:
http://xkcd.com/519/ :-)
[1] J. P. M. Lalley, “THE LEARNING PYRAMID: DOES IT POINT TEACHERS IN THE RIGHT DIRECTION?,” Education, vol. 128, no. 1, p. 64, Fall 2007.