Timing Rhythms: Perceived Duration Increases with a Predictable Temporal Structure of Short Interval Fillers

Area of Science:

• Cognitive psychology
• Neuroscience
• Auditory perception

Background:

• Perceived duration is influenced by temporal structure.
• Isochronous intervals are perceived as longer than random or empty intervals.
• Existing models include non-linear accumulator-counter and neural entrainment mechanisms.

Purpose of the Study:

• To investigate how predictable temporal structures, specifically rhythmically grouped stimuli, affect perceived duration.
• To compare perceived duration of rhythmically grouped intervals with isochronous and anisochronous intervals.
• To explore the influence of stimulus grouping on duration perception.

Main Methods:

• Experiments were conducted using auditory stimuli with varying temporal structures.
• Participants compared perceived durations of intervals filled with isochronous, anisochronous, and rhythmically grouped stimuli.
• The number of stimuli within each rhythmic group was manipulated.

Main Results:

• Intervals filled with predictable rhythmically grouped stimuli were perceived as longer than anisochronous intervals.
• No consistent over- or underestimation was found for rhythmically grouped stimuli compared to isochronous intervals.
• The number of stimuli per group significantly influenced perceived duration.

Conclusions:

• Predictability in temporal structure, beyond simple isochrony, can distort perceived duration.
• Findings support both non-linear clock and neural response magnitude accounts of duration perception.
• The grouping structure of stimuli is a critical factor in temporal perception.