Table 1.
Direction discrimination thresholds averaged on logarithmic scale over ten participants. The standard error of the mean (SEM) is given in parentheses (±)
| Condition | Commanded shape | Frequency (Hz) | Threshold ± SEM (deg/s) |
|---|---|---|---|
| I | Triangular | 0.15 | 1.984 (0.373/0.314) |
| II | Sinusoidal | 0.15 | 2.552 (0.552/0.454) |
| III | Trapezoidal | 0.15 | 2.124 (0.457/0.376) |
| IV | Triangular | 0.7 | 0.939 (0.111/0.099) |
| V | Sinusoidal | 0.7 | 1.051 (0.112/0.101) |
| VI | Trapezoidal | 0.7 | 0.897 (0.107/0.096) |
| VII | Triangular | 3 | 0.804 (0.030/0.029) |
| VIII | Sinusoidal | 3 | 0.778 (0.051/0.049) |
| IX | Trapezoidal | 3 | 0.766 (0.038/0.036) |
Note that the SEM is asymmetric because it was calculated on a logarithmic scale and that the actual profile shape for the 3-Hz profiles deviated from the commanded shape