Table 2.
Results for physiological measures, pain reports and task difficulty.
| Measure | Stimulus Level | Condition | |||||
|---|---|---|---|---|---|---|---|
| Low | Medium | High | No Task | Easy | Moderate | Hard | |
| SEP (μVolts) Mean (s.d.) |
38.38 (16.93) |
40.46 (16.48) |
41.42 (17.31) |
45.51 (17.29) |
39.38 (17.20) |
38.59 (16.54) |
38.66 (16.21) |
| PDR (mm) Mean (s.d.) |
0.173 (0.442) |
0.239 (0.475) |
0.340 (0.555) |
0.277 (0.502) |
0.256 (0.494) |
0.234 (0.506) |
0.225 (0.489) |
| Pain Rating Mean (s.d.) |
|||||||
| Worst Pain | 7.49 (1.53) |
6.36 (2.10) |
6.51 (1.91) |
6.29 (1.80) |
|||
| Least Pain | 1.98 (1.24) |
1.81 (1.10) |
1.98 (1.21) |
1.85 (1.29) |
|||
| Average Pain | 4.94 (1.12) |
4.50 (1.34) |
4.57 (1.34) |
4.58 (1.43) |
|||
| Task Difficulty Mean (95% CI) |
|||||||
| Accuracya (%) | 91.3 (87.5- 95.1) |
89.2 (85.4- 93.0) |
86.3 (82.5- 90.1) |
||||
| Response time (ms) |
0.59 (0.57- 0.61 |
0.65 (0.63- 0.66) |
0.67 (0.65- 0.69) |
||||
a
Task accuracy= (number correct = number false alarms)/total pitch errors
Abbreviations: SEP= stimulus evoked potential; mm= millimeters; PDR= pupil dilation response; S.D.= standard deviation; CI= confidence interval; ms= milliseconds.