Most of the yields details were extracted from the fresh questionnaire study
In non-heterosexuals, exactly how many sexual partners of preferred sex are indicated because high code out-of a couple parameters assessing the amount of men and women sexual lovers before year (on the same level once the over)
On project, redheadedness is actually computed having fun with numerous tips: participants’ self-declaration regarding the questionnaire, experimenters’ observer report into the laboratory study, and two methods of measuring locks coloration that have a spectrophotometer. A previously had written study from the results regarding redheadedness to the vitamin D concentration, that was performed on a single studies, revealed that all the a lot more than-mentioned signs of redheadedness synchronised very firmly with each other and you can provided almost similar overall performance (Flegr ainsi que al., 2020b). In the modern research, i’ve hence decided to use only care about-said redheadedness that will give greatest comparability with assorted past (Frost et al., 2017; Flegr and you will Sykorova, 2019) and you can coming training towards outcomes of redheadedness. Self-reported redheadedness was counted as the a reaction to examining most recent natural redheadedness toward a half a dozen-part scale anchored which have “undoubtedly non-red” (code step one) and you will “scarlet” (password 6). Correlations anywhere between most other indicators out-of redheadedness and you may sexual practices is demonstrated from inside the Secondary Dining table S1, and you will again reveal that all the methods of deciding redheadedness render extremely comparable performance. It signifies that the easiest and you will least expensive means, particularly participants’ self-rating playing with a preliminary ordinal level, is well-known in the future knowledge as it encourages acquisition of investigation from high inhabitants samples.