Fig. 3.

(a) Main effect of the contrast [Cry − Tone Control] thresholded at P < 0.001, uncorrected. The AI ROI was generated by identifying the local maximum of activity within the AI and including all activated voxels within 10 voxels of the peak in the X, Y and Z direction; plot of beta contrast values [Cry − Tone Control] from functionally derived right AI ROI vs (b) number of CAG repeats in exon 1 of AR, (c) restrictiveness, (d) responsibility. Linear and quadratic fits are indicated by the dotted and solid black lines, respectively. Only the quadratic fit is significant [F(31) = 3.49, P < 0.05 for quadratic vs r(32) = 0.15, P = 0.41 for linear]. The dotted red line indicates the score (72) at which mothers and fathers are equally responsible for their child’s daily care. Scores below 72 imply that the mother does more than the father and scores above 72 imply the opposite.