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Interrupting timing in interval production and discrimination: similarities and differences.
Claudette Fortin1, Sébastien Tremblay
1Ecole de psychologie, Université Laval, Que., Canada G1K 7P4. claudette.fortin@psy.ulaval.ca
Behavioural Processes
|November 29, 2005
Summary
Anticipating a break shortens perceived time duration in auditory tasks. However, cues reducing this expectancy only affected longer tones, not shorter ones, in a time discrimination experiment.
Area of Science:
- Cognitive Psychology
- Human Timing Perception
- Auditory Discrimination
Background:
- Human timing perception is studied via temporal production and discrimination tasks.
- Break expectancy shortens perceived duration in both paradigms.
- Break duration influences time production but not discrimination, suggesting different preparatory processes.
Purpose of the Study:
- To investigate the effect of break expectancy and cues on time discrimination.
- To explore how break location and duration influence perceived auditory duration.
- To compare findings with previous time production studies.
Main Methods:
- Participants performed a temporal discrimination task, classifying tones as 'short' or 'long'.
- Varied break location and duration, and used cues to signal break absence in uninterrupted trials.
- Analyzed the impact of pre-break duration and expectancy manipulation on perceived duration.
Main Results:
- Perceived duration shortened with increased pre-break duration, confirming break expectancy effects.
- Cues reducing expectancy in uninterrupted tones decreased 'short' responses for long tones only.
- Varying break duration did not affect perceived duration in the discrimination task.
Conclusions:
- Break expectancy influences auditory time discrimination, shortening perceived duration.
- Expectancy effects are modulated by cues, but selectively based on tone length.
- Findings highlight differences between temporal production and discrimination regarding break processing.