“…Simultaneously, ERPs were recorded to linguistic and nonlinguistic probe stimuli superimposed on the narratives at both the attended and unattended speakers. Consistent with previous findings (Woldorff & Hillyard, 1991;Hillyard & Picton, 1987;Woods et al, 1984;Hansen, Dickstein, et al, 1983;Hansen & Hillyard, 1980;Näätänen, 1979Näätänen, , 1982Hink et al, 1977Hink et al, , 1978Hillyard et al, 1973), in adults, the ERP waveforms evidenced the typical auditory attention effect for both types of probes: an enhanced negativity for probes when attended as compared with those same Figure 3. In a comparison of the attention effects (attended-unattended) in children and adults using normalized difference measures, a Group  Hemisphere  Laterality interaction reflected the relatively greater left-than-right lateral extension of attention effects observed in adults.…”