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Principal modes for the estimate of spatial period for periodic and non-periodic stimuli.
| Periodic gratings | Sandpapers | |||||||
|---|---|---|---|---|---|---|---|---|
| P1 | P2 | P3 | P4 | P5 | P800 | P240 | P80 | |
| Principal mode (mm) | 0.163 | 0.237 | 0.394 | 0.804 | 1.64 | 0.269 | 0.288 | 0.279 |
| Percentage of observations (%) | 57.49 | 59.78 | 68.02 | 49.42 | 59.73 | |||
The percentage of observations corresponds to the fraction of the observations that have a spatial period within ±20% of the spatial period of the stimuli.
