- Results of correlation between perceived difficulty and sway using Spearman’s test.
| Spearman’s test | Perceived difficulty | |||||
|---|---|---|---|---|---|---|
| D100 | D50 | Df | Dm | DQA | Ds | |
| Sway | ||||||
| NPL_AP | -0.048 | -0.324 | -0.579** | -0.113 | -0.365 | -0.438* |
| NPL_ML | 0.032 | -0.409* | 0.150 | 0.159 | 0.148 | -0.284 |
| RMS_AP | 0.157 | -0.256 | -0.382 | -0.139 | -0.244 | -0.353 |
| RMS_ML | 0.034 | -0.022 | 0.388 | 0.150 | 0.446* | 0.038 |
NPL- normalized path length, RMS- root mean square, AP- anteroposterior, ML- mediolateral, D100- counting backwards by subtracting 3 numbers starting from 100, D50 - listening to specific numbers and determine if they were less or more than 50, Dm - reciting months backwards, DQA - regular conversation containing questions and answers, Ds - backward spelling of five-letter words, Df - verbal fluency by naming items or characteristics that start with a certain letter.