Figure 2: Inverse Efficiency (IE) indexes for each condition of the visuospatial imagery task for the two groups. Bars indicate standard error of the mean of measurements in 64 bodies and 64 letter trials for 25 SpD (spastic diplegia) and 30 TD (typical development) participants; thinner dotted grey lines indicate within-group comparisons, and thicker dotted black line indicates between-group comparison. Asterisks indicate significant .