Digit ratio (2D:4D) and altruism: evidence from a large, multi-ethnic sample

Frontiers in Behavioral Neuroscience
Matteo M Galizzi, Jeroen Nieboer

Abstract

We look at the links between the Digit Ratio-the ratio of the length of the index finger to the length of the ring finger-for both right and left hands, and giving in a Dictator Game. Unlike previous studies with exclusively Caucasian subjects, we consider a large, ethnically diverse sample. Our main results are as follows. First, for Caucasian subjects we estimate a significant positive regression coefficient for the right hand digit ratio and a significant negative coefficient for its squared measure. These results replicate the findings of Brañas-Garza et al. (2013), who also observe an inverted U-shaped relationship for Caucasian subjects. Second, we are not able to find any significant association of the right hand digit ratio with giving in the Dictator Game for the other main ethnic groups in our sample, nor in the pooled sample. Third, we find no significant association between giving in the Dictator Game and the left hand digit ratio.

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Citations

Apr 5, 2016·Scientific Reports·Levent NeyseUlrich Schmidt
Feb 7, 2018·Frontiers in Behavioral Neuroscience·Kobe Millet, Florian Buehler
Feb 24, 2018·Frontiers in Behavioral Neuroscience·Katharina Lima de MirandaUlrich Schmidt
Jan 10, 2018·Frontiers in Behavioral Neuroscience·Jan Duchoslav
Feb 23, 2019·PloS One·Kobe Millet, Aylin Aydinli
Nov 3, 2017·Journal of Dental Education·Parker A S CrutchfieldMatthew S Wilson
Feb 15, 2018·Frontiers in Behavioral Neuroscience·Patricio S Dalton, Sayantan Ghosal
Jul 9, 2020·Scientific Reports·Leopold Maria Lautenbacher, Levent Neyse
Jan 13, 2018·Frontiers in Behavioral Neuroscience·Laura KaltwasserAndrea Hildebrandt
Feb 9, 2018·Frontiers in Behavioral Neuroscience·Diego Aycinena, Lucas Rentschler
Jan 3, 2020·Journal of the Economic Science Association·Elle ParslowAnna Dreber

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