Table 1.

Feature-based attention in the low-uncertainty experiment (n=4 observers). P-values of two-tailed paired t-tests, and p-values of Wilcoxon tests in parenthesis.

Comparison of orientation ranges	Performance for ±45° < performance for near ±45°	Performance for near ±45° < performance for far ±45°	Performance for ±45° < performance for far ±45°
Valid pre-cues	0.010 (0.057)	0.013 (0.057)	0.003 (0.029)
Invalid pre-cues	0.089 (0.057)	0.017 (0.029)	0.009 (0.029)
Valid minus invalid	0.804 (0.486)	0.500 (0.886)	0.467 (0.486)