Data analysis
The VOR gain was obtained based on different system settings. To
analysis the gain from gaze-angle experiments, since we repeated
performed the vHIT on the same participant, we performed the one-way
repeated measure ANOVA on the data from different angles, with the angle
as the variable of interest. We further check the assumptions with the R
function. The level of statistical significance was set atp <0.05, which means the angle contributed to the
significant difference between groups. Then we performed Bonferroni test
between data of each angle to 0° to determine which group(s) was
significantly better than 0°.
To evaluate the inter-examiner differences, we performed limits of
agreement (LOAs) and Bland-altman plots to compare the distributions of
values and statistical differences.
For the comparison experiments, we aimed to compare VG respectively to
Oto and ESC, rather than in between all three of these systems. Thus, we
applied t-test analysis on either VG to Oto and VG to ESC with SPSS
software.