Filling your time: Auditory flutter alters perceived duration via stimulus-locked responses

Area of Science:

• Cognitive Neuroscience
• Auditory Perception
• Psychophysics

Background:

• The flutter-duration illusion describes the subjective extension of perceived time when an interval contains auditory flutter.
• Understanding the neural mechanisms underlying temporal illusions is crucial for cognitive science.

Purpose of the Study:

• To investigate the electrophysiological correlates of the flutter-duration illusion.
• To identify neural patterns that predict perceived duration in flutter-filled intervals.

Main Methods:

• Participants reproduced auditory flutter-filled and empty time intervals.
• Electrophysiological activity (EEG) was recorded during interval reproduction.
• Multivariate pattern analysis (MVPA) and single-trial analysis were employed.

Main Results:

• Participants significantly over-produced flutter-filled durations compared to empty durations.
• Distinct neural activity patterns differentiated flutter-filled from empty intervals.
• Two specific neural activity clusters predicted perceived duration in the flutter condition, correlating with the second and fourth flutter clicks.

Conclusions:

• The flutter-duration illusion is associated with specific neural activity patterns.
• These patterns, particularly those related to the N1P2 and P3a components, may reflect timing initiation and arousal, respectively, influencing duration perception.