Figure 4

Validation of optimized lexical decision task. (Left) Response accuracy on version 2 of the LDT was highly correlated with reading ability in young children. The color bar indicates the age of each child (n = 24). (middle) Performance across the three matched stimulus lists was nearly identical (error bars represent ± 1 standard error of the mean across subjects, N = 118). (right) Performance is stable over the three blocks of the experiment. Each bar represents the proportion correct on 25% of the trials in a block (21 trials) and the dotted red line represents overall mean performance (N = 118).