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Recalibration of subjective simultaneity between self-generated movement and delayed auditory feedback
Koichi Toida1, Kanako Ueno, Sotaro Shimada
1Departments of aArchitecture bElectronics and Bioinformatics, School of Science and Technology, Meiji University, Kawasaki cJapan Science and Technology Agency, CREST, Tokyo, Japan.
Neuroreport
|November 13, 2013
Summary
The brain recalibrates auditory feedback timing based on experimental delay ranges. This adjustment helps perceive self-generated sounds and external events, influencing delay detection thresholds.
Area of Science:
- Auditory Perception
- Motor Control
- Neuroscience
Background:
- Temporal contingency between motor commands and auditory feedback is vital for processing self-generated and external sounds.
- Understanding how the brain adapts to altered auditory feedback is key to auditory perception research.
Purpose of the Study:
- To investigate if the range of delayed auditory feedback influences the delay detection threshold (DDT) for self-generated sounds.
- To determine how the brain recalibrates subjective simultaneity based on experimental delay ranges.
Main Methods:
- Participants performed a button-press task, receiving auditory feedback.
- The range of auditory feedback delay was manipulated across experimental conditions.
- A logistic function was fitted to delay-detection data to calculate the DDT.
Main Results:
- The DDT varied significantly across different delay ranges (P<0.01).
- Longer mean delays in the experimental range led to longer DDTs.
- This recalibration effect was not observed when the minimum delay exceeded 250 ms.
Conclusions:
- Subjective simultaneity between auditory feedback and self-generated movement is adaptable.
- The brain appears to automatically recalibrate this perception towards the mean delay presented.
- This recalibration is robust but may have limits, as shown by the 250 ms minimum delay condition.
