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Table 2 Task performance, interrater reliability, and clinical correlations. Task parameter sensitivity is defined by the corresponding z-score cutoff range

From: A robot-based behavioural task to quantify impairments in rapid motor decisions and actions after stroke

   

Subjects with stroke (% impaired)

Interrater reliability

Parameters (normative models)

z-score cutoff

BIT > =130

BIT < 130

Intraclass correlation (P)

LA

RA

 

Global performance

Target hits

<−1.645

78

68

96

0.93 (2×10−11)

Distractor hits

>1.645

6

23

21

0.80 (2×10−6)

Object hits

<−1.645

64

51

86

0.89 (2×10−9)

Distractor proportion

>1.645

39

51

79

0.90 (2×10−9)

Object processing rate

<−1.645

42

51

69

0.83 (2×10−7)

 

Spatial and temporal performance

Miss bias

>|1.96|

25

0

21

0.54 (0.004)

Hand transition

>|1.96|

32

33

57

0.24 (0.11)

Median error

<−1.645

51

53

82

0.55 (0.002)

 

Hand specific performance

Hand bias (hits)

>|1.96|

67

69

75

0.89 (5×10−9)

Hand selection overlap

<−1.645

21

23

32

0.61 (8×10−4)

Total hand bias area

>|1.96|

50

53

71

0.80 (5×10−7)

Hand bias speed

>|1.96|

63

64

86

0.93 (5×10−11)

object hits

left

<−1.645

85

14

89

0.90 (2×10−10)

right

<−1.645

29

74

54

0.78 (4×10−6)

Distractor proportion

left

>1.645

59

39

96

0.93 (7×10−11)

right

>1.645

26

67

61

0.84 (1×10−7)

Total hand area

left

<−1.645

60

14

68

0.91 (3×10−10)

right

<−1.645

25

40

32

0.81 (3×10−7)

hand speed

left

<−1.645

68

14

86

0.89 (4×10−9)

right

<−1.645

21

54

50

0.84 (2×10−7)

Parameters impaired

95 % (>5)

79

79

96

0.96 (1×10−14)

  1. Abbreviations: BIT (behavioural inattention test), LA (left-affected subject), RA (right-affected subject)
  2. Interrater reliability is shown by the intraclass correlation and corresponding p-values