The fusion of unattended duration representations as indexed by the mismatch negativity (MMN).

Within a single train of same-duration (standard) stimuli, an occasional longer-duration (deviant) sound elicits mismatch negativity (MMN) with a peak latency (measured relative to sound onset) reflecting the standard duration representation. When two such trains are presented in a dichotic paradigm, a separate duration representation arises for each train. We examined the role of attention in this segregation.