The efficiency variables was basically obtained from the newest survey studies
During the low-heterosexuals, what amount of sexual couples of your prominent sex is expressed as the highest password from a couple of details determining how many male and female sexual couples before year (on the same level as over)
About investment, redheadedness try computed having fun with several strategies: participants’ care about-report on questionnaire, experimenters’ observer declaration inside research data, and two ways of calculating hair pigmentation that have a spectrophotometer. A previously had written study from the results of redheadedness to your nutritional D amount, that has been did on the same analysis, showed that every a lot more than-said indicators off redheadedness coordinated extremely firmly along and you will provided almost the same efficiency (Flegr et al., 2020b). (more…)