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Updated: Jul 5, 2026
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A Two-interval Forced-choice Task for Multisensory Comparisons
Published on: November 9, 2018
Measuring the perceived content of auditory objects using a matching paradigm.
Adrian K C Lee1, Steve Babcock, Barbara G Shinn-Cunningham
1Hearing Research Center, Boston University, Boston, MA 02215, USA.
Summary
This study improved auditory object perception by using a complex tone target, enhancing listener judgments of sound contributions. Results show a more accurate balance between target contributions to competing auditory objects.
Area of Science:
- Auditory perception
- Psychoacoustics
- Auditory scene analysis
Background:
- Previous studies used ambiguous pure tones, leading to inconsistent listener judgments on sound object contributions.
- Listeners struggled to accurately determine the perceptual role of a pure tone target within competing auditory streams.
Purpose of the Study:
- To investigate if a complex-tone target improves perceptual organization in auditory mixtures.
- To assess listener accuracy in attributing target contributions to competing auditory objects using a direct matching task.
Main Methods:
- Utilized auditory stimuli with an ambiguous complex-tone target and competing auditory objects (sequential tone stream, harmonic complex).
- Employed a direct matching task for listeners to report the target's perceptual contribution to each object.
- Manipulated spatial cues to influence perceptual organization.
Main Results:
- The direct matching task was efficient and reliable for assessing perceptual contributions.
- A complex-tone target was perceived as stronger in the harmonic complex and weaker in the sequential tone stream compared to previous studies.
- The sum of target contributions to both objects approximated the physical target level, unlike in prior research.
Conclusions:
- A complex-tone target enhances the perceptual strength within competing auditory objects.
- Direct matching tasks provide reliable data for auditory perception research.
- Findings suggest improved methods for studying auditory scene analysis and sound object formation.
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