Document Type
Article
Publication Date
8-2019
Publisher
Frontiers Media S.A.
Source Publication
Frontiers in Endocrinology
Source ISSN
1664-2392
Original Item ID
DOI: 10.3389/fendo.2019.00537
Abstract
The present research examined whether differential placing of the basal flexion creases contributes to the occurrence of sex differences in digit ratio (2D:4D) derived from palmar digit lengths. The ratio of palmar-to-dorsal digit length, a measure of the placing of the basal flexion crease in the finger, was derived for the digits 2 and 4 of the right hand in two independent samples (Study I: N = 100; Study II: N = 200), in accordance with discovery-replication sample approach. The results show that men have lower palmar-to-dorsal digit ratios than women, and this effect is significantly stronger for digit 2 than for digit 4. Thus, the present study supports the likelihood that differential placing of flexion creases in the digits contributes to the occurrence of sex differences in palmar 2D:4D. In addition (Study II), the measurement procedure assessing the placing of flexion creases was validated. In conclusion, this evidence highlights potential conceptual shortcomings and technical limitations in the measurement conventions and methods currently employed in the field of 2D:4D research.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Kumar, Sanjay; Voracek, Martin; and Singh, Maharaj, "Differential Placing of Flexion Creases Contributes to Sex Differences in the Second-to-Fourth Digit Ratio (2D:4D)" (2019). College of Nursing Faculty Research and Publications. 1111.
https://epublications.marquette.edu/nursing_fac/1111
Comments
Published version. Frontiers in Endocrinology, Vol. 10 (August 2019). DOI. © 2019 Kumar, Voracek and Singh. This is an open-access article distributed under the terms of the Creative Commons Attribution License
.