Table 4 The comparison of network graph measures at different spectral bands between the pre-test and post-test for the error amplification (EA) and control groups.

From: Quick balance skill improvement after short-term training with error amplification feedback for older adults

(A)

Theta (4–7 Hz)

Pre-test

Post-test

Hotelling’s statistics

Pos hoc test

Control

Leaf Fraction

0.564 ± 0.003

0.569 ± 0.003

Wilks’ Λ = 0.641, p = 0.156

ηp2 = 0.359

 

Diameter

0.334 ± 0.001

0.331 ± 0.002

 

Ave. eccentricity

0.263 ± 0.001

0.262 ± 0.001

 

BCmax

0.725 ± 0.002

0.727 ± 0.002

 

EA

Leaf fraction

0.565 ± 0.002

0.562 ± 0.003

Wilks’ Λ = 0.475, p = 0.026

ηp2 = 0.525

t17 = −1.084, p = 0.293, ηp2 = 0.065

Diameter

0.332 ± 0.002

0.339 ± 0.002a

t17 = 3.617, p = 0.002, ηp2 = 0.435

Ave. eccentricity

0.263 ± 0.001

0.267 ± 0.001a

t17 = 3.315, p = 0.004, ηp2 = 0.393

BCmax

0.726 ± 0.002

0.724 ± 0.002

t17 = −0.584, p = 0.567, ηp2 = .020

(B)

Alpha (8–12 Hz)

Pre-test

Post-test

Hotelling’s statistics

Pos hoc test

Control

Leaf fraction

0.567 ± 0.003

0.570 ± 0.003

Wilks’ Λ = 0.719, p = 0.295

ηp2 = 0.281

 

Diameter

0.332 ± 0.001

0.329 ± 0.002

 

Ave. eccentricity

0.262 ± 0.001

0.259 ± 0.001

 

BCmax

0.726 ± 0.002

0.733 ± 0.002

 

EA

Leaf fraction

0.562 ± 0.003

0.534 ± 0.003b

Wilks’ Λ = 0.464 p = 0.022

ηp2 = 0.536

t17 = −2.638, p = 0.030, ηp2 = 0.248

Diameter

0.335 ± 0.001

0.336 ± 0.001

t17 = 0.777, p = 0.448, ηp2 = 0.034

Ave. eccentricity

0.264 ± 0.001

0.266 ± 0.001

t17 = 1.647, p = 0.118, ηp2 = 0.138

BCmax

0.728 ± 0.002

0.724 ± 0.002

t17 = -1.641, p = 0.119, ηp2 = 0.137

(C)

Beta (13–35 Hz)

Pre-test

Post-test

Hotelling’s statistics

Pos hoc test

Control

Leaf fraction

0.573 ± 0.006

0.570 ± 0.005

Wilks’ Λ = 0.821, p = 0.567

ηp2 = 0.179

 

Diameter

0.327 ± 0.004

0.331 ± 0.003

 

Ave. eccentricity

0.259 ± 0.003

0.262 ± 0.002

 

BCmax

0.731 ± 0.004

0.727 ± 0.003

 

EA

Leaf fraction

0.569 ± 0.003

0.570 ± 0.006

Wilks’ Λ = 0.736, p = 0.333

ηp2 = 0.264

 

Diameter

0.323 ± 0.003

0.329 ± 0.004

 

Ave. eccentricity

0.263 ± 0.002

0.260 ± 0.003

 

BCmax

0.732 ± 0.003

0.729 ± 0.004

 
  1. (A) theta band (4–7 Hz), (B) alpha band (8–13 Hz), (C) beta band (13–35 Hz). (BCmax: maximal betweenness centrality).
  2. aPost-test > Pre-test, p < 0.005.
  3. bPost-test < Pre-test, p < 0.05.