Lag showed only small and inconsistent effects on behavioral measures of accuracy, sensitivity and response latency, and did not appear to corroborate the intended manipulation of task difficulty. Thus, these effects will not be further detailed for sake of brevity. Most importantly, lag failed to interact with group in any performance measure. As a consequence, electrophysiologic measures were pooled across lag to increase their signal-to-noise ratio and to reduce the complexity of the design (cf. Kayser et al., 2003, 2007).
