| Speaker | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AF1 | 0 | 0 | 14 | 8 | 0 | 2 | 4 | 6 | 0 | 6 | 9 | 1 | 1 | 1 | 4 | 2 | 3 | 3 | 3 | 1 | 2 | 0 | 6 | 10 | 3 | 8 | 0 | 1 | 1 | 2 | 0 | 0 | 0 |
| AF2 | 0 | 0 | 2 | 4 | 8 | 7 | 6 | 3 | 5 | 2 | 4 | 3 | 4 | 5 | 4 | 5 | 3 | 3 | 7 | 4 | 5 | 11 | 0 | 1 | 7 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 |
| AF7 | 14 | 2 | 0 | 6 | 1 | 3 | 5 | 8 | 2 | 8 | 7 | 0 | 1 | 0 | 3 | 4 | 1 | 1 | 2 | 1 | 7 | 0 | 9 | 12 | 1 | 4 | 0 | 1 | 1 | 2 | 0 | 0 | 0 |
| AF8 | 8 | 4 | 6 | 0 | 0 | 7 | 6 | 7 | 10 | 6 | 12 | 2 | 1 | 5 | 9 | 8 | 6 | 7 | 9 | 1 | 8 | 3 | 2 | 11 | 4 | 4 | 0 | 1 | 0 | 2 | 0 | 0 | 0 |
| AF9 | 0 | 8 | 1 | 0 | 0 | 3 | 1 | 2 | 2 | 2 | 0 | 9 | 11 | 5 | 3 | 3 | 3 | 1 | 3 | 10 | 2 | 7 | 2 | 1 | 2 | 2 | 1 | 2 | 2 | 1 | 0 | 2 | 2 |
| AM1 | 2 | 7 | 3 | 7 | 3 | 0 | 8 | 1 | 7 | 4 | 3 | 6 | 3 | 13 | 8 | 5 | 11 | 10 | 5 | 2 | 6 | 3 | 1 | 0 | 4 | 3 | 0 | 1 | 0 | 0 | 0 | 1 | 1 |
| AM3 | 4 | 6 | 5 | 6 | 1 | 8 | 0 | 3 | 4 | 2 | 5 | 3 | 1 | 5 | 4 | 3 | 3 | 6 | 3 | 1 | 2 | 3 | 2 | 2 | 5 | 0 | 2 | 2 | 2 | 3 | 1 | 1 | 2 |
| AM4 | 6 | 3 | 8 | 7 | 2 | 1 | 3 | 0 | 6 | 12 | 6 | 1 | 1 | 2 | 4 | 3 | 1 | 2 | 3 | 1 | 5 | 4 | 5 | 13 | 4 | 4 | 1 | 0 | 1 | 0 | 2 | 1 | 1 |
| AM5 | 0 | 5 | 2 | 10 | 2 | 7 | 4 | 6 | 0 | 8 | 7 | 1 | 4 | 2 | 4 | 15 | 6 | 4 | 8 | 2 | 15 | 6 | 0 | 7 | 4 | 0 | 1 | 0 | 0 | 2 | 0 | 0 | 0 |
| AM6 | 6 | 2 | 8 | 6 | 2 | 4 | 2 | 12 | 8 | 0 | 6 | 0 | 2 | 1 | 7 | 6 | 2 | 3 | 5 | 1 | 12 | 3 | 4 | 9 | 4 | 3 | 0 | 1 | 1 | 2 | 0 | 0 | 0 |
| AM8 | 9 | 4 | 7 | 12 | 0 | 3 | 5 | 6 | 7 | 6 | 0 | 1 | 0 | 3 | 5 | 6 | 4 | 4 | 11 | 1 | 6 | 4 | 3 | 10 | 6 | 5 | 0 | 1 | 1 | 3 | 0 | 0 | 0 |
| ALSF2 | 1 | 3 | 0 | 2 | 9 | 6 | 3 | 1 | 1 | 0 | 1 | 0 | 15 | 10 | 1 | 1 | 6 | 5 | 1 | 19 | 0 | 1 | 0 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| ALSF5 | 1 | 4 | 1 | 1 | 11 | 3 | 1 | 1 | 4 | 2 | 0 | 15 | 0 | 5 | 4 | 3 | 6 | 3 | 2 | 19 | 4 | 3 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| ALSF6 | 1 | 5 | 0 | 5 | 5 | 13 | 5 | 2 | 2 | 1 | 3 | 10 | 5 | 0 | 7 | 1 | 10 | 11 | 4 | 6 | 0 | 2 | 0 | 0 | 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| ALSF7 | 4 | 4 | 3 | 9 | 3 | 8 | 4 | 4 | 4 | 7 | 5 | 1 | 4 | 7 | 0 | 7 | 10 | 11 | 9 | 3 | 7 | 2 | 0 | 2 | 5 | 3 | 0 | 1 | 0 | 1 | 1 | 0 | 0 |
| ALSF8 | 2 | 5 | 4 | 8 | 3 | 5 | 3 | 3 | 15 | 6 | 6 | 1 | 3 | 1 | 7 | 0 | 5 | 2 | 7 | 3 | 14 | 4 | 1 | 8 | 4 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 |
| ALSF9 | 3 | 3 | 1 | 6 | 3 | 11 | 3 | 1 | 6 | 2 | 4 | 6 | 6 | 10 | 10 | 5 | 0 | 10 | 5 | 6 | 3 | 5 | 0 | 1 | 3 | 2 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| ALSM1 | 3 | 3 | 1 | 7 | 1 | 10 | 6 | 2 | 4 | 3 | 4 | 5 | 3 | 11 | 11 | 2 | 10 | 0 | 6 | 2 | 4 | 3 | 0 | 3 | 4 | 5 | 0 | 1 | 0 | 1 | 0 | 0 | 0 |
| ALSM4 | 3 | 7 | 2 | 9 | 3 | 5 | 3 | 3 | 8 | 5 | 11 | 1 | 2 | 4 | 9 | 7 | 5 | 6 | 0 | 1 | 9 | 4 | 5 | 4 | 4 | 5 | 1 | 1 | 1 | 1 | 1 | 2 | 2 |
| ALSM7 | 1 | 4 | 1 | 1 | 10 | 2 | 1 | 1 | 2 | 1 | 1 | 19 | 19 | 6 | 3 | 3 | 6 | 2 | 1 | 0 | 1 | 2 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| ALSM8 | 2 | 5 | 7 | 8 | 2 | 6 | 2 | 5 | 15 | 12 | 6 | 0 | 4 | 0 | 7 | 14 | 3 | 4 | 9 | 1 | 0 | 5 | 1 | 5 | 6 | 0 | 0 | 1 | 0 | 2 | 1 | 0 | 0 |
| HDM10 | 0 | 11 | 0 | 3 | 7 | 3 | 3 | 4 | 6 | 3 | 4 | 1 | 3 | 2 | 2 | 4 | 5 | 3 | 4 | 2 | 5 | 0 | 1 | 2 | 11 | 0 | 0 | 0 | 1 | 2 | 1 | 0 | 0 |
| HDM11 | 6 | 0 | 9 | 2 | 2 | 1 | 2 | 5 | 0 | 4 | 3 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 5 | 0 | 1 | 1 | 0 | 7 | 2 | 9 | 5 | 3 | 3 | 3 | 3 | 6 | 6 |
| HDM12 | 10 | 1 | 12 | 11 | 1 | 0 | 2 | 13 | 7 | 9 | 10 | 0 | 1 | 0 | 2 | 8 | 1 | 3 | 4 | 1 | 5 | 2 | 7 | 0 | 2 | 5 | 1 | 2 | 1 | 1 | 1 | 1 | 0 |
| HDM8 | 3 | 7 | 1 | 4 | 2 | 4 | 5 | 4 | 4 | 4 | 6 | 2 | 2 | 2 | 5 | 4 | 3 | 4 | 4 | 2 | 6 | 11 | 2 | 2 | 0 | 0 | 0 | 1 | 1 | 3 | 2 | 0 | 0 |
| PDF5 | 8 | 1 | 4 | 4 | 2 | 3 | 0 | 4 | 0 | 3 | 5 | 1 | 0 | 3 | 3 | 0 | 2 | 5 | 5 | 0 | 0 | 0 | 9 | 5 | 0 | 0 | 6 | 6 | 6 | 5 | 5 | 7 | 7 |
| PDF7 | 0 | 1 | 0 | 0 | 1 | 0 | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 5 | 1 | 0 | 6 | 0 | 19 | 16 | 13 | 20 | 22 | 19 |
| PDM10 | 1 | 0 | 1 | 1 | 2 | 1 | 2 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 3 | 2 | 1 | 6 | 19 | 0 | 17 | 16 | 18 | 19 | 18 |
| PDM12 | 1 | 0 | 1 | 0 | 2 | 0 | 2 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 3 | 1 | 1 | 6 | 16 | 17 | 0 | 16 | 16 | 16 | 18 |
| PDM13 | 2 | 1 | 2 | 2 | 1 | 0 | 3 | 0 | 2 | 2 | 3 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 2 | 2 | 3 | 1 | 3 | 5 | 13 | 16 | 16 | 0 | 12 | 13 | 15 |
| PDM15 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 3 | 1 | 2 | 5 | 20 | 18 | 16 | 12 | 0 | 21 | 19 |
| PDM8 | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 6 | 1 | 0 | 7 | 22 | 19 | 16 | 13 | 21 | 0 | 20 |
| PDM9 | 0 | 0 | 0 | 0 | 2 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 6 | 0 | 0 | 7 | 19 | 18 | 18 | 15 | 19 | 20 | 0 |
Note. The frequency with which each pair of speakers was judged to be similar by listeners is shown in each cell. This matrix was used to conduct the cluster and multidimensional scaling analyses. A = ataxia; F = female; M = male; ALS = amyotrophic lateral sclerosis; HD = Huntington's disease; PD = Parkinson's disease.