Table 2 Statistical results for number of re-grasps, wrist peak velocity, acceleration and deceleration time rates. Results of ANOVA tests (F) and its post-hoc comparisons, and results of the Friedman tests (χ2) and its post-hoc comparisons with T-Wilcoxon Signed Ranks test (W) or Sign test (S). For the post-hoc test, p-values (padj) are adjusted with the Bonferroni correction. Significant results (p < 0.05) are highlighted in boldface. R Rigid object, I Intermediate object, D Deformable object.
From: Human manipulation strategy when changing object deformability and task properties
# Re-grasps | Peak velocity | Acceleration time rate | Deceleration time rate | ||||||
|---|---|---|---|---|---|---|---|---|---|
Long hole | Short hole | Long hole | Short hole | Long hole | Short hole | Long hole | |||
N = 19 | N = 17 | N = 17 | N = 17 | N = 17 | N = 17 | N = 17 | |||
Main effects | Deformability | χ2 = 35.565 p < 0.001 | F = 7.478 p = 0.002 | F = 7.536 p = 0.006 | F = 5.170 p = 0.011 | F = 5.279 p = 0.010 | F = 5.170 p = 0.011 | F = 5.279 p = 0.010 | |
Accuracy | Sign test p = 0.004 | F = 0.246 p = 0.627 | F = 2.433 p = 0.138 | F = 2.630 p = 0.124 | F = 2.301 p = 0.149 | F = 2.630 p = 0.124 | F = 2.301 p = 0.149 | ||
Deformability *Accuracy | χ2 = 3.050 p = 0.218 | F = 1.109 p = 0.342 | F = 1.545 p = 0.229 | F = 1.101 p = 0.345 | F = 0.916 p = 0.410 | F = 1.101 p = 0.345 | F = 0.916 p = 0.410 | ||
Post-hoc tests | Deformability | R–I | padj = 0.001S | padj = 1.000 | padj = 0.185 | padj = 0.131 | padj = 1.000 | padj = 0.131 | padj = 1.000 |
R–D | padj < 0.001S | padj = 0.009 | padj = 0.022 | padj = 0.032 | padj = 0.004 | padj = 0.032 | padj = 0.004 | ||
I–D | padj < 0.001S | padj = 0.052 | padj = 0.071 | padj = 1.000 | padj = 0.080 | padj = 1.000 | padj = 0.080 | ||
