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The proportion of “do not know” responses by origin of the participants, distance stimuli, and visual salience stimuli.
| Stimulus picture | NE | SE | |
| n(%) | n(%) | ||
| Distance | Picture 1 | 254(35.2) | 201(27.9) |
| Picture 2 | 309(42.9) | 230(31.9) | |
| Picture 3 | 70(9.7) | 56(7.7) | |
| Picture 4 | 57(7.9) | 57(7.9) | |
| Picture 5 | 180(25.0) | 136(18.9) | |
| Picture 6 | 108(15.0) | 63(8.7) | |
| Visual salience | Picture 7 | 285(39.6) | 152(21.1) |
| Picture 8 | 252(35.0) | 87(12.1) | |
| Picture 9 | 265(36.8) | 115(15.9) |
