Table 2 Mean values of outcome measures for novice and expert groups

Number of joystick excursions

Rolls backward 5 meters

1.79 (1.80)

1.36 (.31)

n.s

0.33

Turns 90° (forward)

1.50 (.67)

1.38 (.42)

n.s

0.21

Turns 90° (backward)

2.25 (1.56)

1.66 (.78)

n.s

0.48

Turns 180° in place

9.67 (6.30)

2.07 (1.76)

p < .001

1.64

Manoeuvres sideways

14.26 (8.10)

3.82 (2.30)

p < .001

1.75

Gets through hinged door

8.58 (4.46)

6.61 (4.57)

n.s

0.44

Task time (sec)

Rolls backward 5 meters

12.93 (6.59)

8.41 (4.46)

p < .05

0.80

Turns 90° (forward)

6.26 (2.73)

4.40 (2.14)

n.s

0.76

Turns 90° (backward)

11.29 (7.07)

6.63 (4.59)

p < .01

0.78

Turns 180° in place

8.36 (5.45)

5.80 (3.81)

n.s

0.54

Manoeuvres sideways

22.60 (11.94)

11.50 (6.38)

p < .001

1.16

Gets through hinged door

24.09 (18.80)

21.02 (20.42)

n.s

0.16

Directional Variability

Rolls backward 5 Meters

14.56 (10.56)

17.68 (6.49)

n.s

-0.36

Turns 90° (forward)

30.59 (7.14)

31.48 (13.36)

n.s

-0.08

Turns 90° (backward)

30.83 (20.09)

24.56 (13.95)

n.s

0.36

Turns 180° in Place

57.09 (9.24)

52.29 (15.09)

n.s

0.38

Manoeuvres Sideways

71.74 (1.63)

76.51 (2.67) n.s

-2.1

Gets Through Hinged Door

65.49 (10.12)

66.87 (8.37)

n.s

-0.14