Fig. 2.

(a) Behavioral capacity estimates (top) and contralateral delay activity (CDA; bottom) for both older and younger adults. This illustrates the dissociation between behavioral and neural activity in the older adults, whereas younger adults demonstrate the common pattern of both capacity and CDA increasing with set size. (b) Posterior event-related potential (ERP) activity in both older adults (top) and younger adults (bottom). The magnitude of the difference between contralateral (gray) and ipsilateral (black) activity between 1,000 and 1,600 ms post-sample-onset (indicated by the open gray box) was used to construct the CDA. The gray areas near the beginning of the time courses indicate the time during which the sample was visible. (c) Waveforms for sample-locked ERP activity, averaged across all participants