2D:4D digit ratio

Clinical trials for 2D:4D digit ratio explained in plain language.

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Completed 1

Finger length could predict mental grit on the soccer field

Knowledge-focused Completed

This study looks at whether the ratio of a person's index finger to ring finger (2D:4D)—a marker of prenatal hormone exposure—relates to mental toughness in amateur soccer players. Researchers measured finger lengths and surveyed 270 players about their mental resilience. The goa…

Matched conditions: 2D:4D DIGIT RATIO

Sponsor: Istanbul Gelisim University • Aim: Knowledge-focused

Last updated Jul 10, 2026 00:00 UTC

2D:4D digit ratio

Get alerted when new 2D:4D digit ratio trials appear

Finger length could predict mental grit on the soccer field