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Stimuli.
| Frequency of the first note (Hz) | Frequency of the second note (Hz) | ||
|---|---|---|---|
| Octave | Fifth | Tritone | |
| 200 | 100 | 133.33 | 142.22 |
| 210 | 105 | 140 | 149.33 |
| 220 | 110 | 146.66 | 156.44 |
| 230 | 115 | 153.33 | 163.55 |
| 240 | 120 | 160 | 170.66 |
| 250 | 125 | 166.66 | 177.77 |
| 260 | 130 | 173.33 | 184.88 |
First and second notes were displayed simultaneously for 50 ms. Seven intervals with varying frequencies were displayed for each interval type.
