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Table 4 Correlation between visual functions and standardised residual performance measures with and without missing values

From: The Relationship Between Visual Function and Performance in Para Swimming

Visual functions

Performance measures

BRT

ST

CSp

TT

FT

MLP

Excluding missing values

 Visual acuity

.40**

.31*

− .23

.26

.50***

.71***

 Contrast sensitivity

− .30

− .27

.20

− .15

− .49**

− .60***

 Light sensitivity

− .06

.08

.15

− .07

− .01

− .21

 Depth perception

.06

− .18

.16

− .13

− .11

− .10

 Visual search

− .20

.15

.33

− .30

− .05

− .30

 Motion perception

.09

− .26

− .32

.02

.21

.37

Including missing values (using dummy values)

 Visual acuity

.40**

.31*

− .23

.26

.50***

.71***

 Contrast sensitivity

− .27

− .24

.20

− .15

− .43**

− .54***

 Light sensitivity

.27

.32*

− .19

.19

.31*

.41**

 Depth perception

.32*

.19

− .17

.15

.41**

.47**

 Visual search

.35*

.27*

− .18

.18

.56***

.53***

 Motion perception

− .06

− .23

− .11

− .06

− .07

− .15

  1. All coefficients are Pearson correlations. All performance measures except for mean lateral position in the lane are adjusted according to training volume and gender. The number of participants included in each correlation vary between n = 24 and n = 45
  2. BRT best race time, CSp clean speed, FT finish time, MLP mean lateral position, ST start time, TT turn time
  3. *p < 0.05; **p < 0.01; ***p < 0.001