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Assignment of the factors' row values to the categories used for X2and Kendall's T analyses.
| Training intensity index | Feedback modality | Number of EEG-NFB electrodes | EEG-NFB electrode position | ||||
|---|---|---|---|---|---|---|---|
| Raw value | Category value | Raw value | Category value | Raw value | Category value | Raw value | Category value |
| 0–5 | 1 | Auditory | 1 | 1 | 1 | Other than Cz | 1 |
| 5–10 | 2 | Visual | 2 | >1 | 2 | Cz | 2 |
| >10 | 3 | Visual and auditory | 3 | ||||
