highly significantP < 0.001
These sequential effects were highly significant (previous stimulus: t (31) = 8.572, P < 0.001; previous response: t (31) = 8.317, P < 0.001), and their magnitudes and attraction profiles were consistent with earlier reports [ 27 , 31 , 38 ], following a first derivative of Gaussian (DoG) curve (previous stimulus: amplitude = 2.91° [2.18 3.60], peak location = 20.28° [18.60 22.75]; previous response: amplitude = 4.10° [3.06 5.15], peak location = 22.48° [19.95 25.05]).