Related Experiment Videos
Auditory streaming affects the processing of successive deviant and standard sounds
Dagmar Müller1, Andreas Widmann, Erich Schröger
1Institut für Psychologie I, Universität Leipzig, Leipzig, Germany. dagmar_mueller@uni-leipzig.de
Psychophysiology
|December 21, 2005
Summary
Auditory stream segregation occurs before automatic deviance detection, as shown by mismatch negativity (MMN) responses. Sound processing, including initial N1 amplitudes, is also impacted by auditory streaming.
Area of Science:
- Auditory Neuroscience
- Cognitive Psychology
- Human Auditory Perception
Background:
- Early auditory processing involves segregating sound into streams and detecting changes.
- The temporal relationship between stream segregation and deviance detection is not fully understood.
Purpose of the Study:
- To investigate the temporal order of auditory stream segregation and automatic deviance detection.
- To determine if auditory streaming affects early sound processing.
Main Methods:
- Analysis of mismatch negativity (MMN) and N1 amplitudes to successive deviant and standard tones.
- Comparison of responses in streaming versus nonstreaming auditory conditions.
Main Results:
- Mismatch negativity (MMN) reduction was smaller for deviants in different streams than in the same stream.
- No such MMN difference was observed in the nonstreaming condition.
- Modulations in N1 amplitudes for standard tones indicated streaming affects initial sound processing.
Conclusions:
- Auditory stream segregation precedes automatic deviance detection.
- Auditory streaming influences not only change detection but also initial auditory stimulus processing.