| Title |
Finger Length Ratios of Identical Twins with Discordant Sexual Orientations
|
|---|---|
| Published in |
Archives of Sexual Behavior, July 2018
|
| DOI | 10.1007/s10508-018-1262-z |
| Pubmed ID | |
| Authors |
Tuesday M. Watts, Luke Holmes, Jamie Raines, Sheina Orbell, Gerulf Rieger |
| Abstract |
A proposed marker of prenatal androgen exposure is the ratio of the index finger to ring finger (2D:4D). Within each sex, this ratio may be lower for those who were exposed to higher levels of androgens and become attracted to women, as compared to those who were exposed to lower levels of androgens and become attracted to men. We examined these patterns in identical twins with discordant sexual orientations. Because these twins are genetically identical, differences in prenatal androgen exposure, as reflected in their different finger length ratios, might contribute to their discordance. For 18 female twin pairs, non-straight (bisexual or lesbian) twins had significantly lower, or more masculinized, 2D:4D ratios than their straight co-twins, but only in the left hand. For 14 male pairs, non-straight twins had, contrary to our prediction, more masculinized finger length ratios than straight co-twins, but this difference was not significant. A reanalysis of present and previous data (Hall & Love, 2003; Hiraishi, Sasaki, Shikishima, & Ando, 2012) suggested that these patterns were robust. Furthermore, males had more masculinized 2D:4D ratios than females. This sex difference did not vary by sexual orientation. |
X Demographics
The data shown below were collected from the profiles of 38 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 9 | 24% |
| Spain | 3 | 8% |
| United Kingdom | 3 | 8% |
| Germany | 1 | 3% |
| Bulgaria | 1 | 3% |
| Canada | 1 | 3% |
| Sri Lanka | 1 | 3% |
| Australia | 1 | 3% |
| France | 1 | 3% |
| Other | 0 | 0% |
| Unknown | 17 | 45% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 31 | 82% |
| Scientists | 4 | 11% |
| Practitioners (doctors, other healthcare professionals) | 2 | 5% |
| Science communicators (journalists, bloggers, editors) | 1 | 3% |
Mendeley readers
The data shown below were compiled from readership statistics for 44 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 44 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 8 | 18% |
| Other | 5 | 11% |
| Student > Doctoral Student | 4 | 9% |
| Student > Bachelor | 4 | 9% |
| Professor > Associate Professor | 3 | 7% |
| Other | 7 | 16% |
| Unknown | 13 | 30% |
| Readers by discipline | Count | As % |
|---|---|---|
| Psychology | 10 | 23% |
| Medicine and Dentistry | 5 | 11% |
| Biochemistry, Genetics and Molecular Biology | 4 | 9% |
| Nursing and Health Professions | 2 | 5% |
| Computer Science | 2 | 5% |
| Other | 7 | 16% |
| Unknown | 14 | 32% |
Attention Score in Context
This research output has an Altmetric Attention Score of 181. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 16 August 2023.
All research outputs
#226,899
of 25,784,004 outputs
Outputs from Archives of Sexual Behavior
#148
of 3,784 outputs
Outputs of similar age
#4,768
of 341,992 outputs
Outputs of similar age from Archives of Sexual Behavior
#4
of 55 outputs
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So far Altmetric has tracked 3,784 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 33.6. This one has done particularly well, scoring higher than 96% of its peers.
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