ImPACT Reaction Time Composite ImPACT Visual Motor Speed Composite Eyes Open Firm Surface (SI) 0.128 (0.101) -0.009 (0.909) Eyes Closed Firm Surface (SI) 0.175 (0.024)* -0.265 (0.001)* Eyes Open Foam Surface (SI) 0.206 (0.008)* -0.219 (0.005)* Eyes Closed Foam Surface (SI) 0.198 (0.011)* -0.093 (0.237)

Table 3: Correlations between Sway Index Scores (SI) on balance conditions and ImPACT Reaction Time Composite and Visual Motor Speed Composite. R-values are reported first, then P values in parentheses. An asterisk indicates significance.