The correlations between RCFT performance and FC, where the most significant difference was observed between groups, were examined using partial correlation analysis to controlling of sex. We used the Kolmogorov–Smirnov test to evaluate the normal distribution of data. Matlab version 8.3 (Math Works, Natick, MA, USA) and SPSS version 21 (IBM, Inc., Armonk, NY, USA) were used for analysis.