Table 2 Variance of RT with different velocities, volley types and illumination levels (s). Source SS df MS F S .27676827 29 .00954373 Ball Velocity(A) .02372459 1 .02372459 5.49* S*A .12523422 29 .00431842 Volley(B) .00614679 1 .00614679 1.56 S* B .11441265 29 .00394526 Illumination(C) .08979137 1 .08979137 26.23* S* C .09929178 29 .00342385 Ball Velocity* Volley (A* B) .00556797 1 .00556797 2.61 S*A* B .06183147 29 .00213212 Ball Velocity* Illumination (A* C) .00571146 1 .00571146 2.72 S* A* C .06093196 29 .00210110 Volley* Illumination(B* C) .00561837 1 .00561837 1.74 S* B* C .09359095 29 .00322727 Ball Velocity* Volley* Illumination(A* B* C) .00262291 1 .00262291 0.91 S* A* B*C .08403370 29 .00289771 Total 1.05527845 239 * p < 0.05