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Illusory square discrimination task. A, Stimuli. The ratio of inducer radius to length of square was 0.2. B, Behavioral performance data (bars indicate SE). C, VEPs at electrode site PO6. D, Relationship between the Square minus No-Square RT (x-axis) and occipital phase-locking (y-axis) effects. The greater the RT savings, the larger the phase-locking effects for NC but not SZ.
