Presaccadic preview shapes postsaccadic processing more where perception is poor.

Surprisingly, we found a main effect of location, F (3, 39) = 4.34, P = 0.010, η p 2 = 0.25, 95% CI η = [0.02, 0.41], which was driven by a lower postsaccadic contrast sensitivity after upward saccades (15.00 ± 3.16) compared to the other directions [rightward: 29.49 ± 4.76; P = 0.015, 95% CI = (0.91, 28.05); leftward: 26.23 ± 3.64; P = 0.054, 95% CI = (−2.34, 24.80), marginally significant; downward: 30.85 ± 2.77; P = 0.014, 95% CI = (2.28, 29.42)] ( Fig. 4 ).

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