Figure 4.

Cervical dystonia reward‐learning is impaired and correlates with severity of motor symptoms. (a) Individual performance in patients (red dots) and controls (blue) demonstrates significant reduction in number of rewards obtained post‐reversal (*p = 0.013, Mann–Whitney z(78) = −2.47). Black crosses represent mean and 95% confidence limits. (b) The normalized learning rate (σ ^‐1 α) estimate for each individual patient is plotted against their CDIP‐58 motor sub‐scores. There was a significant negative relationship between motor score severity and learning rate (R ² = 0.17, p = 0.008) [Colour figure can be viewed at http://wileyonlinelibrary.com]