The heritability value was taken as the regression coefficient between final height and midparental height
Is this the same sense of the word 'heritability' that is in use in https://en.wikipedia.org/wiki/Heritability and in answers on this site, namely
Var G/Var P? Or are there two different senses in use simultaneously?
Edit: see https://www.jstor.org/stable/2531017 ... heritability h^2 is defined as follows:
Note the superscript (1/2) in the equation, indicating a square root. So the slope of the regression does not seem to be a ratio of variances.
FWIW, Wikipedia cites the S.E.P., which cites Behavioral Genetics by Plomin.