Table 3.
Correlations between all variables for all the subjects.
| Ball speed | BVE | MVM | FED | FEV | DFAD | DFAV | |
| MRE (m) | −0.042 | 0.050 | −0.196* | −0.264** | −0.068 | 0.159 | −0.121 |
| Ball speed (km/h) | -- | −0.107 | 0.092 | 0.237* | 0.303** | −0.211* | −0.042 |
| BVE (m) | -- | -- | 0.392** | −0.121 | −0.203* | 0.163 | 0.034 |
| MVM (m/s) | -- | -- | -- | 0.745** | 0.321* | −0.398** | −0.063 |
| FED | -- | -- | -- | -- | 0.607** | −0.645** | −0.106 |
| FEV | -- | -- | -- | -- | -- | −0.440** | −0.200* |
| DFAD | -- | -- | -- | -- | -- | -- | 0.193* |
| * p < .05; ** p < .01 | |||||||
MRE: mean radial error (m); ball speed (km/h); BVE: bivariate variable error (m); MVM: mean velocity magnitude (m/s); FED: fuzzy entropy of the displacement of COP (unitless); FEV: fuzzy entropy of the velocity of COP (unitless); DFAD: detrended fluctuation analysis of the displacement of COP (unitless); DFAV: detrended fluctuation analysis of the velocity of COP (unitless).