The ratio of second and fourth finger lengths (2D:4D) can determine handedness

Home Page
About
Submit A Journal
Submit A Conference
Submit Paper/Book
- Submit a Preprint
- Submit a Book
Contact

Dicle Tıp Dergisi
Volume:50 Issue:4 - Vol 50, Sayı 4
The ratio of second and fourth finger lengths (2D:4D) can determine handedness

The ratio of second and fourth finger lengths (2D:4D) can determine handedness

Pages : 453-460

View : 46 | Download : 56

Publication Date : 2023-12-29

Article Type : Research Paper

Abstract :Objective: The human body exhibits both structural and functional asymmetry. One measure of this asymmetry is the ratio of 2D:4D, which is the proportion of measurements of the 2nd (2D) and 4th finger (4D). In this research, our objective is to investigate the potential association between the ratio of 2D:4D and handedness with voluntary individuals. Methods: A total of 312 individuals volunteered to take part in the research, where their left and right hand\'s 4th and 2nd finger lengths were measured using a precise digital caliper. The \"Edinburgh Handedness Inventory\" was used to determine hand lateralization. To determine the significance between the two independent groups, the Mann Whitney U Test was used. On the other hand, to determine the significance between the two dependent groups, the Wilcoxon Signed Rank Test was utilized. Results: Of the participants, 154 were male and 158 were female (age range 18-55, mean age=28.34). According to the Edinburgh Handedness Inventory, 275 individuals were right handed, 18 were left handed, and 19 were bimanual. The Mann Whitney U Test showed a significant result in the ratio of right hand 2D:4D between male and female participants who were right handed (z =-1.979, p = 0.048). Additionally, the Wilcoxon Signed Ranks Test demonstrated a difference between the right and the left hand ratio of 2D:4D for all participants which was significant (z = -2.822, p = 0.005), as well as for participants who were right handed (z = -2.850, p = 0.004). Conclusion: The ratio of 2D:4D finger lengths could be a significant indicator of hand preference in both male and female healthy individuals. The ratio of 2D:4D holds potential as an indicator and research tool in understanding human emotions, thoughts, and behaviors.
Keywords : Finger, Handedness, Finger Length Ratio, Testosterone, Estrogen

ORIGINAL ARTICLE URL

VIEW PAPER (PDF)

* There may have been changes in the journal, article,conference, book, preprint etc. informations. Therefore, it would be appropriate to follow the information on the official page of the source. The information here is shared for informational purposes. IAD is not responsible for incorrect or missing information.