Skip to main content

Table 2 Critical aperture, imagery and action ratios in the anorexia nervosa (AN) group and in the healthy control group

From: Painfully thin but locked inside a fatter body: abnormalities in both anticipation and execution of action in anorexia nervosa

 

AN group

Control group

 
 

(n = 14)

(n = 14)

 
 

Mean

SD

Median

Min; Max

Mean

SD

Median

Min; Max

p

Critical aperture

         

 Motor imagery task

44.32

6.11

45.75

9.5 ; 58.5

46.64

4.94

42.00

6.0 ; 56.5

0.28(a)

 Action task

7.35

3.24

48.00

3.0; 52.0

47.75

3.00

48.00

0.0 ; 53.0

0.74(a)

Ratio

         

 Motor imagery task

1.29

0.17

1.27

1.05 ; 1.62

1.09

0.10

1.09

0.90 ; 1.21

<.0001(b)

 Action task

1.32

0.07

1.34

1.13 ; 1.41

1.16

0.07

1.16

1.05 ; 1.32

<.0001(b)

   First set

1.29

0.08

1.30

1.13 ; 1.38

1.16

0.11

1.13

1.02 ; 1.42

 

   Second set

1.35

0.11

1.37

1.13 ; 1.51

1.18

0.06

1.17

1.06 ; 1.28

 
  1. Critical aperture in the motor imagery task: the mean width at which the participant thinks it is no longer possible to pass through without turning the shoulders. Critical aperture in the action task: the mean width at which the participant begins to turn their shoulders by more than a baseline level of natural body sway. Ratio in the motor imagery task: the motor imagery critical aperture divided by the shoulder width in the motor imagery condition. Ratio in the action task: the action critical aperture divided by shoulder width in the action condition. (a): in a T test; (b): in a Mann–Whitney U test.