Table 5 Performance time and eye tracking metrics during the 12 abstract objects from the Southampton Hand Assessment Procedure

Performance time of all 12 tasks (seconds)

422.58

(m = 35.22, SD = 23.35)

274.74

(m = 22.90,

SD = 18.58)

35% less

212.33

(m = 17.68,

SD = 29.18)

85.34

(m = 7.11,

SD = 1.19)

60% less

130.64

(m = 10.89, SD = 4.36)

–

Total fixation duration on the prosthetic hand (seconds)

104.25

(m = 8.69,

SD = 7.00)

84,43

(m 7.04,

SD = 6.99)

19% less

101.18 (m = 8.43,

SD = 14.70)

35.85

(m = 3.02,

SD 1.92)

65% less

83.76

(m = 6.98, SD = 3.75)

–

Total fixation count on the prosthetic hand (frequency)

490

(m = 40.83,

SD = 27.61)

448

(m = 37.33, SD = 34.92)

8% less

177

(m = 14.75,

SD 17.58)

121

(m = 10.09, SD = 5.20)

32% less

142

(m = 11.83, SD = 6.06)

No data due to problems with the socket

Eye-hand latency between prosthetic hand and objects (seconds)

271.89

(m = 22.66,

SD = 21.93)

129.15 (m = 10.76,

SD = 15.68)

52% shorter

12.12 (m = 1.01,

SD = 1.04)

9.90

(m = 0.82, SD = 0.99)

18% shorter

44.80 (m = 3.45, SD = 2.53)

–

Total saccade amplitude during the tasks (degree)

66.49

(m = 5.54,

SD = 2.12)

82.71 (m = 8.31,

SD = 3.37)

24% higher*

38.14 (m = 3.84,

SD = 2.71)

91.06

(m = 8.09,

SD 2.46)

138% higher*

88.51 (m = 7.38, SD = 2.20)

–