Is there a standard formula/calculation for sexual dimorphism?
No.13820655 ViewReplyOriginalReport
Quoted By: >>13820686 >>13820882
Is there a standard, or most accepted, way to present a value for sexual dimorphism? For example, one could use
(Female value / Male value) ?1
This would give negative values when the female value is smaller than the males, and positive when male is smaller. My issue with this though is that when a female is twice the size of a male its value is -0.5, while when a male is twice the size of a female its value is 1.0, so they do not spread symmetrically around 0.
After playing a little in R i found a possible solution 0.5 - \frac{\text{Female}}{\text{Female + Male}}
This gives a zero centred value with equal distribution around the mean. For example, when Females are twice the size of males the value is -0.166, and when males are twice the size of females the value is 0.166, when they are the same size it is 0.
(Female value / Male value) ?1
This would give negative values when the female value is smaller than the males, and positive when male is smaller. My issue with this though is that when a female is twice the size of a male its value is -0.5, while when a male is twice the size of a female its value is 1.0, so they do not spread symmetrically around 0.
After playing a little in R i found a possible solution 0.5 - \frac{\text{Female}}{\text{Female + Male}}
This gives a zero centred value with equal distribution around the mean. For example, when Females are twice the size of males the value is -0.166, and when males are twice the size of females the value is 0.166, when they are the same size it is 0.
