Table 2.
Error rates for controls and relatives across each percentage level difference in pitch, amplitude, and duration on the tone discrimination task.
| Percentage level (%) | Controls | Relatives | ||||||
|---|---|---|---|---|---|---|---|---|
| M | SD | M | SD | F | p | D | OP | |
| PITCH | ||||||||
| Same | 4.75 | 4.12 | 6.53 | 8.56 | 2.54 | 0.118 | −0.26 | 0.26 |
| 2 | 15.36 | 17.63 | 19.96 | 13.51 | 3.21 | 0.080 | −0.29 | 0.27 |
| 5 | 9.58 | 15.85 | 10.15 | 12.91 | 0.09 | 0.768 | −0.04 | 0.07 |
| 10 | 7.94 | 14.25 | 8.77 | 13.17 | 0.00 | 0.972 | −0.06 | 0.08 |
| 25 | 1.04 | 2.59 | 0.44 | 1.31 | 1.30 | 0.261 | 0.29 | 0.27 |
| 50 | 0.14 | 0.80 | 0.00 | 0.00 | 1.02 | 0.318 | 0.25 | 0.22 |
| AMPLITUDE | ||||||||
| Same | 8.79 | 10.41 | 6.88 | 7.20 | 1.21 | 0.276 | 0.21 | 0.22 |
| 2 | 50.30 | 18.35 | 62.30 | 17.84 | 4.56 | 0.038 | −0.66 | 0.75 |
| 5 | 38.33 | 17.80 | 49.78 | 16.13 | 5.00 | 0.030 | −0.67 | 0.77 |
| 10 | 28.33 | 18.65 | 41.89 | 20.95 | 5.49 | 0.024 | −0.68 | 0.78 |
| 25 | 12.04 | 12.93 | 24.06 | 26.21 | 3.96 | 0.053 | −0.58 | 0.66 |
| 50 | 2.53 | 3.98 | 5.7 | 12.05 | 0.12 | 0.733 | −0.35 | 0.34 |
| DURATION | ||||||||
| Same | 8.18 | 7.65 | 3.51 | 6.10 | 2.79 | 0.102 | 0.67 | 0.77 |
| 2 | 47.10 | 19.14 | 56.58 | 17.25 | 1.86 | 0.180 | −0.52 | 0.58 |
| 5 | 50.22 | 15.05 | 60.53 | 12.53 | 3.92 | 0.054 | −0.74 | 0.84 |
| 10 | 56.32 | 18.72 | 66.88 | 19.62 | 1.21 | 0.278 | −0.55 | 0.62 |
| 25 | 17.26 | 16.89 | 27.85 | 20.51 | 4.33 | 0.043 | −0.56 | 0.63 |
| 50 | 5.51 | 10.46 | 5.70 | 10.96 | 0.29 | 0.595 | −0.02 | 0.06 |
The analyses for this data were performed on log-transformed error-rates and controlled for age. The figures presented here are the untransformed error-rates to aid in interpretation. Bold numbers indicate that relatives made significantly more errors in identification of different tones than controls.
OP, observed power.