Table 4. Point-biserial correlations between each maturity indicator and adult performance level (professional vs. non-professional; N = 121). Mirwald Moore-1 Moore-2 Fransen-1 Fransen-2 %PAH %RAH Adult performance level 0.13 0.14 0.10 0.13 0.13 0.21 0.02 %PAH = attained percentage of the predicted adult height; %RAH = attained percentage of the real adult height. Coding of the adult performance level (0 = non-professional, 1 = professional). Critical value of Pearson's r ( = 5%, one-tailed, df = 119): |rcrit| = 0.15.