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| Detection | Discrimination | Mean | |
| Horizontal | 12.8 (2.4) | 42.1 (8.2) | 27.5 (4.5) |
| Vertical | 5.1 (2.5) | −18.8 (7.9) | −6.9 (4.2) |
| Mean | 9.0 (1.8) | 11.7 (6.3) | 10.3 (3.3) |
Values in parentheses are standard errors.
