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首页> 外文期刊>Archives of Sexual Behavior >Photocopies Yield Lower Digit Ratios (2D:4D) Than Direct Finger Measurements
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Photocopies Yield Lower Digit Ratios (2D:4D) Than Direct Finger Measurements

机译：影印比直接手指测量产生更低的数字比（2D：4D）

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The ratio between 2nd and 4th digit length (2D:4D) may be a negative correlate of prenatal testosterone. This possibility has led to a number of studies of 2D:4D and its relationship with sexual orientation and other sex-dependent traits. At first, 2D:4D ratio was calculated from measurements made directly on the fingers but recently a number of studies have used measurements from photocopies of the hands. Here, we compared finger lengths (2D, 3D, 4D, and 5D) and ratios obtained from these two measurement techniques. Our sample consisted of 30 homosexual men and 50 men and 70 women who were not selected for their sexual orientation. We found evidence that (1)2D:4D from photocopies tended to be lower than that from direct measurements, (2) there were differences in finger lengths such that 2D from photocopies tended to be shorter or equal in length to direct measurements, while 4D from photocopies tended to be longer or equal in length to direct measurements, (3) the sex differences in 2D:4D tended to be stronger for photocopy measurements, and (4) the pattern for length differences across 2D to 5D appeared to be different for homosexual men compared to men and women recruited without regard to sexual orientation. We conclude that there are differences in digit ratios obtained from photocopies and direct measurements, and these differences arise from length differences recorded from the different protocols. Therefore, 2D:4D ratios obtained from photocopies and direct measurements should not be combined within one study nor should they be used together in comparative studies. We suggest that finger length differences between the two techniques could result from the shapes of fat-pads at the tips of the fingers and these may be dependent on sex and sexual orientation.
机译：第2位数与第4位数长度之比（2D：4D）可能与产前睾丸激素呈负相关。这种可能性导致了许多关于2D：4D及其与性取向和其他性别相关性状的关系的研究。首先，根据直接在手指上进行的测量来计算2D：4D比率，但是最近许多研究使用了从手的影印件进行的测量。在这里，我们比较了手指的长度（2D，3D，4D和5D）和从这两种测量技术获得的比率。我们的样本包括30名同性恋者，50名男性和70名女性，他们没有因性取向而选择。我们发现证据：（1）影印的2D：4D倾向于比直接测量的要低，（2）手指的长度存在差异，因此影印的2D的长度倾向于比直接测量的短或相等，而4D从影印的长度趋于更长或相等到直接测量，（3）影印测量的2D：4D性别差异往往更强，（4）影印在2D到5D之间的长度差异的模式似乎不同同性恋男性与不考虑性取向而招募的男女相比。我们得出的结论是，从影印和直接测量获得的数字比例存在差异，这些差异是由不同协议记录的长度差异引起的。因此，从影印和直接测量中获得的2D：4D比例不应在一项研究中组合，也不应在比较研究中一起使用。我们建议，两种技术之间的手指长度差异可能是由指尖上的脂肪垫的形状引起的，这些可能取决于性别和性取向。

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