Figure 1

Predicted effects on ERP mean amplitudes. Predicted effects of the amplitude modulation expected on the basis of latent inhibition, with attenuation at ISIs of 400 ms or longer; refractoriness, where attenuation is expected to be most pronounced at the shortest ISIs and amplitude increase expected with increasing ISI; or facilitation, where enhancement of the amplitude at ISIs of 100-200 ms would be expected. No assumptions about the mutual exclusivity of these processes have been made, and the pattern of modulation could conceivably involve combinations of the profiles depicted. The lower panel of the figure presents a schematised display showing the timing for two consecutive trials, highlighting the temporal relationship between stimulus duration, the interstimulus interval between the tone pairs, and the intertribal interval.