If the data across the three studies are combined, after
mean-centering within each set, a visual regression coefficient of 0.548
(95% CI = 0.460, 0.637) contrasts with a palm-board coefficient of
−0.021 (95% CI = −0.163, 0.122), with the model explaining 21.7% of
the variance (F2,604 = 85.05, p b .001). Correlations can never demonstrate
dissociation, only association,