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Table 2 Results of the Wilcoxon signed ranks tests comparing performance of every task between the two training series; speed versus damage control

From: Speed versus damage: using selective feedback to modulate laparoscopic simulator performance

  Instrument navigation
  Total time Tissue damage
session 1 session 2 session 3 session 4 session 1 session 2 session 3 session 4
Z-value −4,20 −6,03 −6,57 −5,70 −3,71 −5,50 − 6,27 − 4,97
Significance ,00 ,00 ,00 ,00 ,00 ,00 ,00 ,00
  Lifting & Grasping
  Total time Tissue damage
session 1 session 2 session 3 session 4 session 1 session 2 session 3 session 4
Z-value −3,52 −2,81 −4,01 −4,30 −1,58 −4,59 −5,38 −4,39
Significance ,00 ,01 ,00 ,00 ,11 ,00 ,00 ,00
  Cutting
  Total time Tissue damage
session 1 session 2 session 3 session 4 session 1 session 2 session 3 session 4
Z-value −3,73 −3,57 −2,50 −2,72 −2,14 −3,90 −4,03 − 3,82
Significance ,00 ,00 ,01 ,01 ,03 ,00 ,00 ,00