Journal article

A new means of measuring index/ring finger (2D : 4D) ratio and its association with gender and hand preference

Michael ER Nicholls, Catherine A Orr, Mark J Yates, Andrea M Loftus

LATERALITY | ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD | Published : 2008

Abstract

Relative finger length can predict a person's gender or their hand preference. We measured finger length using a new "tubes" test, which required participants to slide a clear plastic tube over their fingers and read the length from an attached mm scale. Data collected from 600 students demonstrated that the right fingers are longer than the left for dextrals, but not for non-dextrals. Examination of the relative length of the index and ring fingers revealed a clear gender effect. There was also an effect of hand preference on index/ring finger ratio whereby non-dextrals showed a more masculine pattern compared to dextrals. For non-dextrals, prenatal exposure to high testosterone levels may ..

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