Figure 2

Behavioural VSTM performance by group. Adjusted mean performance (for age, sex and NART) by group. (a) Identification accuracy overall and for the higher memory load. (b) Localisation error overall and by delay for the higher memory load (deg log-transformed). Error bars represent standard errors of the group means. PMC presymptomatic mutation carrier, SMC symptomatic mutation carrier. **Significant at p < 0.01.