Table 2 F - test values and p values from one way repeated measures ANOVA and Bonferroni adjusted post-hoc pairwise analysis on step length, step width and step time for unperturbed walking and for selected perturbations

Step length

Within - subjects effect

F - test

2.518

10.597

47.874

6.667

2.724

4.331

0.551

p - value

0.051

0.000*

0.000*

0.000*

0.038*

0.004*

0.736

1-2 (0.003*)

1-2 (0.034*)

2-3 (0.002*)

1-3 (0.055)

2-4 (0.004*)

Pairwise comparison - Step-Step (p-value)

/

2-5 (0.068)

2-4 (0.003*)

3-5 (0.074)

/

2-5 (0.013*)

/

2-6 (0.033*)

2-5 (0.003*)

3-6 (0.085)

2-6 (0.004*)

Step width

Within - subjects effect

F - test

0.826

38.288

43.304

2.793

2.426

8.021

1.328

p - value

0.541

0.000*

0.000*

0.035*

0.058

0.000*

0.279

1-2 (0.017*)

1-2 (0.001*)

1-4 (0.000*)

1-3 (0.046*)

1-3 (0.116)

2-4 (0.000*)

2-4 (0.000*)

2-3 (0.045*)

Pairwise comparison - Step-Step (p-value)

/

2-5 (0.020*)

2-5 (0.001*)

2-3 (0.195)

/

3-5 (0.040*)

/

2-6 (0.018*)

2-6 (0.002*)

3-6 (0.136)

4-5 (0.002*)

3-4 (0.001*)

4-6 (0.003*)

3-6 (0.016*)

4-6 (0.009*)

Step time

Within - subjects effect

F - test

1.778

5.046

21.077

11.346

12.662

1.373

0.734

p - value

0.148

0.002*

0.000*

0.000*

0.000*

0.262

0.604

1-2 (0.008*)

1-4 (0.063)

1-2 (0.068)

1-3 (0.099)

2-3 (0.058)

2-3 (0.026*)

Pairwise comparison -Step-Step (p-value)

/

2-6 (0.055)

2-3 (0.000*)

2-4 (0.041*)

2-4 (0.024*)

/

/

4-6 (0.088)

2-4 (0.003*)

2-5 (0.062)

2-5 (0.063)

2-5 (0.011*)

2-6 (0.062)

2-6 (0.009*)

2-6 (0.001*)