Table 2. Mean impression score for the 10 items about the song stimuli (*p < 0.005 after Bonferroni correction).
| Factor | Human voice | Artificial voice | t-test | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | mean | SD | mean | SD | t value | p | significance | |
| Humanness | 0.87 | 0.23 | 4.0 | 0.4 | 2.5 | 0.5 | 7.6 | p < 10−9 | * |
| Animateness | 0.89 | 0.23 | 3.8 | 0.4 | 2.6 | 0.5 | 6.5 | p < 10−9 | * |
| Naturalness | 0.91 | 0.28 | 3.8 | 0.5 | 2.7 | 0.6 | 5.5 | p = 0.0001 | * |
| Emotional | 0.88 | 0.32 | 3.8 | 0.3 | 2.8 | 0.5 | 6.7 | p < 10−9 | * |
| Familiarity | 0.82 | 0.39 | 3.8 | 0.2 | 3.1 | 0.4 | 5.4 | p < 10−9 | * |
| Comfort | 0.76 | 0.44 | 3.7 | 0.3 | 3.2 | 0.4 | 5.1 | p = 0.0002 | * |
| Warmth | 0.86 | −0.06 | 3.5 | 0.3 | 3.1 | 0.4 | 3.5 | p < 0.004 | * |
| Brightness | 0.35 | −0.14 | 3.3 | 0.4 | 3.0 | 0.3 | 2.5 | p = 0.03 | n.s. |
| Complexity | −0.02 | 0.95 | 2.9 | 0.4 | 2.8 | 0.5 | 1.0 | p = 0.3 | n.s. |
| Regularity | −0.29 | −0.73 | 3.2 | 0.4 | 3.5 | 0.3 | −2.1 | p = 0.06 | n.s. |
SD, standard deviation; n.s., not significant.