Fig. 4.

Performance gains are associated with FA changes in the left SLF-FT. a Changes of performance efficiency after math tutoring. Performance efficiency was assessed using a composite of standardized accuracy and median reaction time (RT) scores on addition and subtraction tasks (n = 18). Error bars represent standard error of mean. b Changes of performance efficiency were correlated with fractional anisotropy (FA) changes in the fronto-temporal part of the left superior longitudinal fasciculus (SLF-FT) (Time 2 − Time 1; n = 17). c FA changes were correlated with changes in three of the four sub-measures of performance change (i.e., accuracy on subtraction and RT on addition and subtraction tasks) that made up the efficiency score (Time 2 − Time 1; n = 17). The performance sub-measures were not significantly correlated amongst themselves. **p < 0.01, *p < 0.05