This research was supported by the Hungarian National Research Fund (OTKA T048383) and the National Institutes of Health (DC04263).
Loudness summation and the mismatch negativity event-related brain potential in humans
Article first published online: 9 FEB 2006
Volume 43, Issue 1, pages 13–20, January 2006
How to Cite
Oceák, A., Winkler, I., Sussman, E. and Alho, K. (2006), Loudness summation and the mismatch negativity event-related brain potential in humans. Psychophysiology, 43: 13–20. doi: 10.1111/j.1469-8986.2006.00372.x
- Issue published online: 9 FEB 2006
- Article first published online: 9 FEB 2006
- (received February 21, 2005; accepted September 1, 2005)
- Temporal integration;
- Temporal window of integration;
- Loudness summation;
- Mismatch negativity (MMN);
- Auditory event-related potentials (ERP);
- Sensory memory
Infrequently omitting a sound from a repetitive sequence elicits the mismatch negativity (MMN) ERP response when the stimulus onset asynchrony (SOA) is less than 200 ms. We contrasted two alternative explanations of omission MMN. (1) Each sound starts a separate temporal integration process. Omissions violate the constancy of the temporal structure within the integration window. (2) Sounds preceding an omission are perceived to be louder than those followed by a sound within the integration period, because omissions allow the full stimulus aftereffect to be included in perceived loudness. We varied the SOA between 117 and 217 ms. For this case, the temporal structure explanation predicts that no MMN will be elicited, whereas the loudness summation explanation predicts that MMN will be elicited. MMN was elicited by tone omissions with random SOA, suggesting that loudness summation plays an important role in the elicitation of omission MMN.