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Table 2 Means (M), standard deviations (SD), t-values, degrees of freedom (df) and effect sizes (d) of perceptual measures of body image for Anorexia Nervosa (AN) patients and Healthy Controls (HC)

From: Attitudinal and perceptual factors in body image distortion: an exploratory study in patients with anorexia nervosa

  HC (n = 28) AN (n = 30)  
Variable M SD M SD t df p d
Body size estimation (Light Beam Apparatus)
With direction of inaccuracy
% estimation accuracy - waist 115.84 18.35 135.68 33.78 2.81 45.36 .007 0.74
% estimation accuracy - hips 120.45 16.06 137.50 44.19 1.98 36.10 .055 0.51
% estimation accuracy - thigh 104.36 19.10 136.61 53.66 3.09 36.68 .004 0.8
% global estimation accuracy 113.55 14.85 136.60 41.65 2.84 36.71 .007 0.74
Without direction of accuracy
% estimation accuracy - waist 20.36 12.91 40.23 28.00 3.51 41.41 .001 0.92
% estimation accuracy - hips 21.56 14.48 43.22 38.40 2.88 37.58 .007 0.75
% estimation accuracy - thigh 15.65 11.43 44.60 46.99 3.27 32.66 .003 0.85
% global estimation accuracy 16.88 10.74 42.13 35.83 3.69 34.50 .001 0.96
Excluding Left-handers HC (n = 27) AN (n = 26)  
Angle paradigm task
All parallel tasks accuracy 9.19 5.00 9.07 4.57 0.09 51.00 .463 0.03
Exploration time 11.69 4.40 24.60 13.41 4.67 30.15 .0001 1.33
All mirror tasks accuracy 6.60 2.53 6.25 2.76 0.47 51.00 .321 0.13
Exploration time 11.15 4.30 23.46 13.23 4.52 30.06 .0001 1.29
All tasks accuracy 7.89 3.15 7.66 3.09 0.27 51.00 .394 0.08
Exploration time 11.42 4.12 24.03 12.66 4.84 30.05 <.0001 1.38
Right hand tasks
Right parallel tasks accuracy 9.34 5.30 10.01 4.53 0.49 51.00 .312 0.14
Exploration time 12.16 4.44 24.31 12.39 4.72 31.11 <.0001 1.34
Right mirror tasks accuracy 7.44 3.95 6.96 4.74 0.40 51.00 .347 0.11
Exploration time 11.15 4.27 23.86 12.52 4.91 30.54 <.0001 1.4
Right hand tasks accuracy 8.39 3.59 8.49 3.94 0.09 51.00 .463 0.03
Exploration time 11.65 3.97 24.08 11.60 5.18 30.58 <.0001 1.47
Left hand tasks
Left parallel tasks 9.03 6.27 8.12 5.96 0.54 51.00 .295 0.15
Exploration time 11.22 4.66 24.88 14.93 4.46 29.67 .0001 1.27
Left mirror tasks accuracy 5.76 2.73 5.55 2.34 0.30 51.00 .384 0.08
Exploration time 11.16 4.76 23.05 14.83 3.90 29.91 .0005 1.11
Left hand tasks accuracy 7.40 3.59 6.84 3.19 0.60 51.00 .276 0.17
Exploration time 11.19 4.45 23.97 14.22 4.38 29.68 .0001 1.25
  1. Significance set at p = .05.