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Improvement in performance due to the addition of meaningful color information.
| Stimulus size | Improvement in performance due to color (%) | p-value [two-tailed t-test (df = 385)] |
|---|---|---|
| 20/400 | 12.6 | p < 0.001 |
| 20/500 | 48.9 | p < 0.001 |
| 20/600 | 46.9 | p < 0.001 |
| 20/800 | 8.3 | p < 0.001 |
| 20/1000 | 2.9 | p = 0.007 |
