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Detailed stimulus characteristics.
| Faces | Cars | Words | Non-words | |
|---|---|---|---|---|
| Degrees of visual angle of the stimulus within the image | 4° × 6° | 4.75° × 2.5° | 4.75° × 1° | 4.75° × 1° |
| Number of pixels of the stimulus within the image | 19684 | 6291 | 2319 | 1915 |
| Mean image luminosity (0–255 scale) ± SD | 152.2 ± 7.8 | 154.8 ± 1.3 | 153.8 ± 0.8 | 154.2 ± 1.0 |
| Mean background brightness (0–255 scale) | 204 | 177 | 162 | 162 |
