Do perceived loudness cues contribute to duration mismatch negativity (MMN)?

This study explored the contribution of perceived loudness cues to mismatch negativity produced in response to a 125 ms duration deviant tone among a regular sequence of 50ms standard tones. Each individual was required to ad just the intensity of a 125ms tone until it matched the perceived loudness of a 50 ms tone. The mismatch negativity produced to the duration deviant p resented at the same intensity as the standard was contrasted with that pro duced to the same deviant at each individual's perceived loudness equivalen ce. Despite a detectable difference in perceived loudness (similar to1.3 dB ), adjusting the intensity of the deviant tone did not significantly reduce mismatch negativity amplitude to the duration deviant. Results are discuss ed with reference to temporal window of integration. NeuroReport 11:3771-37 74 (C) 2000 Lippincott Williams & Wilkins.