Figure 2. ERP waves and averages from experiment 1: delayed recognition. A, Contralateral and ipsilateral ERPs, and contralateral – ipsilateral difference waves. Dashed-line boxes indicate the time across which stimulus-presentation and delay-period signals were averaged. The inverted triangles labeled by “S,” “D,” and “P” indicate the onset of sample, delay, and probe periods, respectively. B, C, Averaged stimulus-presentation and delay-period ERP amplitudes, and difference waves. Asterisks and triangles indicate the outcomes of statistical comparisons: corresponding to *p < 0.05, **p < 0.01, and ***p < 0.00, respectively; and () corresponding to 0.05 < p < 0.1. Homo, Homogeneous; Hetero/Heter, heterogeneous.