Table 3.
Group means of individual physiological channels during the conversations (not corrected for baseline levels)
| Mean |
s.d. |
|||||||
|---|---|---|---|---|---|---|---|---|
| AD | FTD | SD | Control | AD | FTD | SD | Control | |
| Cardiac inter-beat interval (ms) | 969.24 | 792.83 | 925.54 | 1000.43 | 198.30 | 155.51 | 112.48 | 172.20 |
| Finger pulse amplitude (units) | 3.51 | 4.31 | 27.14 | 4.19 | 1.30 | 3.16 | 62.35 | 2.28 |
| Finger pulse transit time (ms) | 282.54 | 268.39 | 305.31 | 283.97 | 26.61 | 24.17 | 29.06 | 27.71 |
| Ear pulse transit time (ms) | 203.43 | 208.98 | 211.15 | 211.74 | 17.28 | 17.95 | 30.86 | 27.83 |
| Skin conductance (µmhos) | 3.24 | 2.33 | 1.17 | 3.20 | 2.11 | 2.18 | 0.96 | 2.03 |
| General somatic activity (units) | 2.69 | 2.55 | 2.53 | 2.80 | 0.78 | 0.50 | 0.77 | 1.22 |
| Finger temperature (degrees Fahrenheit) | 81.93 | 85.39 | 86.15 | 85.34 | 4.75 | 7.16 | 4.47 | 5.69 |
Higher values indicate greater physiological arousal for skin conductance, general somatic activity and finger temperature; lower values indicate greater physiological arousal for cardiac inter-beat interval, finger pulse amplitude, finger pulse transit time and ear pulse transit time.