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Moral judgment and the relative lengths of your fingers

You may find it hard to argue against, or even to begin arguing for, the line of reasoning in this study. It shows how a people’s capacity to make moral judgments is related to the relative lengths of two of their fingers:

honk0101Testosterone administration modulates moral judgments depending on second-to-fourth digit ratio,” Estrella R. Montoya, David Terburg, Peter A. Bos, Geert-Jan Will, Vincent Buskens, Werner Raub, Jack van Honk [pictured right with his fingers are not visible, and below with some fingers visible], Psychoneuroendocrinology, epub January 2, 2013. The authors, at Utrecht University, Leiden University, and the University of Cape Town, explain:

VanHonk“Recent testosterone administration studies show effects on cognitive empathy and social cooperation, which depend on right-hand’s second-to-fourth (2D:4D) digit ratio… Subjects who show an increase in utilitarian judgments following testosterone administration have significantly higher than average 2D:4D… while subjects showing more deontological judgments following testosterone administration have near-significantly lower 2D:4D…”

BONUS: Finger ratios don’t always predict body odor

Improbable Research