Fig 1.

Pre- to post-treatment change in processing speed by treatment, age groups, and level of cognitive reserve. (A) Wide Range Achievement Test (WRAT-3) below median; (B) WRAT-3 above median. High and low pretreatment cognitive reserve were defined by a median split on the WRAT-3 reading score of less than 0.0 or of greater than or equal to 0.0. The bar heights represent the observed post-treatment averages pooled across three assessment time points. The error bars represent the estimated standard errors of the averages accounting for repeated assessments from the same individuals.