Low 2D:4D values are associated with video game addiction

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Abstract

Androgen-dependent signaling regulates the growth of the fingers on the human hand during embryogenesis. A higher androgen load results in lower 2D:4D (second digit to fourth digit) ratio values. Prenatal androgen exposure also impacts brain development. 2D:4D values are usually lower in males and are viewed as a proxy of male brain organization. Here, we quantified video gaming behavior in young males. We found lower mean 2D:4D values in subjects who were classified according to the CSAS-II as having at-risk/addicted behavior (n = 27) compared with individuals with unproblematic video gaming behavior (n = 27). Thus, prenatal androgen exposure and a hyper-male brain organization, as represented by low 2D:4D values, are associated with problematic video gaming behavior. These results may be used to improve the diagnosis, prediction, and prevention of video game addiction. © 2013 Kornhuber et al.

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Kornhuber, J., Zenses, E. M., Lenz, B., Stoessel, C., Bouna-Pyrrou, P., Rehbein, F., … Mößle, T. (2013). Low 2D:4D values are associated with video game addiction. PLoS ONE, 8(11). https://doi.org/10.1371/journal.pone.0079539

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