Skip to main content

Table 1 Mean Group Values of handwriting parameters

From: Handwriting performance in the absence of visual control in writer's cramp patients: Initial observations

Handwriting Parameter

Controls Mean ± SD

Patients Mean ± SD

T-Test p <

Number of written characters in the test sentence

23.12 ± 2.04

19.16 ± 2.77

0.0037 **

Handwriting duration of the test sentence

7728.38 ± 62.29

8740.75 ± 90.44

0.0024 **

Mean vertical pressure

0.87 ± 0.38

0.78 ± 0.16

0.026 *

Mean stroke frequency

3.96 ± 0.74

3.48 ± 0.70

n.s.

Mean time period of segment

258.2 ± 48.37

291.77 ± 52.39

n.s.

Movement duration

5.08 ± 1.13

6.03 ± 1.15

n.s.

Number of Velocity segments

39.49 ± 8.49

41.72 ± 11.49

n.s.

Number of acceleration segments

30.30 ± 10.97

34.54 ± 12.51

n.s.

Number of inversions in velocity

1.41 ± 0.27

1.37 ± 0.36

n.s.

Number of inversion in acceleration

2.15 ± 0.57

2.31 ± 0.77

n.s.

Mean stroke length

5.82 ± 2.81

7.98 ± 3.14

n.s.

Number of pen touches on paper

16.87 ± 8.54

19.03 ± 10.40

n.s.

Mean time pen on paper

6115.27 ± 979.43

6774.18 ± 1041.05

n.s.

Mean time pen lifted

1518.13 ± 542.47

1735.76 ± 972.12

n.s.

Mean trajectory pen on paper

388.38 ± 169.25

483.51 ± 197.38

n.s.

Mean trajectory pen lifted

95.36 ± 61.81

101.29 ± 57.31

n.s.

Absolute velocity pen on paper

67.40 ± 39.13

74.55 ± 35.48

n.s.

Absolute velocity pen lifted

61.48 ± 23.87

59.82 ± 20.78

n.s.

Percent of segments with NIV = 1

82.63 ± 10.51

84.98 ± 12.89

n.s.