Cumulative multisensory discrepancies shape the ventriloquism aftereffect but not the ventriloquism bias.
Multisensory integration and recalibration are two processes by which perception deals with discrepant signals. Both are often studied in the spatial ventriloquism paradigm. There, integration is probed by the presentation of discrepant audio-visual stimuli, while recalibration manifests as an after...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2023-01-01
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| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0290461 |
| _version_ | 1797690864837853184 |
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| author | Christoph Kayser Hame Park Herbert Heuer |
| author_facet | Christoph Kayser Hame Park Herbert Heuer |
| author_sort | Christoph Kayser |
| collection | DOAJ |
| description | Multisensory integration and recalibration are two processes by which perception deals with discrepant signals. Both are often studied in the spatial ventriloquism paradigm. There, integration is probed by the presentation of discrepant audio-visual stimuli, while recalibration manifests as an aftereffect in subsequent judgements of unisensory sounds. Both biases are typically quantified against the degree of audio-visual discrepancy, reflecting the possibility that both may arise from common underlying multisensory principles. We tested a specific prediction of this: that both processes should also scale similarly with the history of multisensory discrepancies, i.e. the sequence of discrepancies in several preceding audio-visual trials. Analyzing data from ten experiments with randomly varying spatial discrepancies we confirmed the expected dependency of each bias on the immediately presented discrepancy. And in line with the aftereffect being a cumulative process, this scaled with the discrepancies presented in at least three preceding audio-visual trials. However, the ventriloquism bias did not depend on this three-trial history of multisensory discrepancies and also did not depend on the aftereffect biases in previous trials - making these two multisensory processes experimentally dissociable. These findings support the notion that the ventriloquism bias and the aftereffect reflect distinct functions, with integration maintaining a stable percept by reducing immediate sensory discrepancies and recalibration maintaining an accurate percept by accounting for consistent discrepancies. |
| first_indexed | 2024-03-12T02:05:14Z |
| format | Article |
| id | doaj.art-7485e246d15c43498e46295322872977 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-03-12T02:05:14Z |
| publishDate | 2023-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-7485e246d15c43498e462953228729772023-09-07T05:31:36ZengPublic Library of Science (PLoS)PLoS ONE1932-62032023-01-01188e029046110.1371/journal.pone.0290461Cumulative multisensory discrepancies shape the ventriloquism aftereffect but not the ventriloquism bias.Christoph KayserHame ParkHerbert HeuerMultisensory integration and recalibration are two processes by which perception deals with discrepant signals. Both are often studied in the spatial ventriloquism paradigm. There, integration is probed by the presentation of discrepant audio-visual stimuli, while recalibration manifests as an aftereffect in subsequent judgements of unisensory sounds. Both biases are typically quantified against the degree of audio-visual discrepancy, reflecting the possibility that both may arise from common underlying multisensory principles. We tested a specific prediction of this: that both processes should also scale similarly with the history of multisensory discrepancies, i.e. the sequence of discrepancies in several preceding audio-visual trials. Analyzing data from ten experiments with randomly varying spatial discrepancies we confirmed the expected dependency of each bias on the immediately presented discrepancy. And in line with the aftereffect being a cumulative process, this scaled with the discrepancies presented in at least three preceding audio-visual trials. However, the ventriloquism bias did not depend on this three-trial history of multisensory discrepancies and also did not depend on the aftereffect biases in previous trials - making these two multisensory processes experimentally dissociable. These findings support the notion that the ventriloquism bias and the aftereffect reflect distinct functions, with integration maintaining a stable percept by reducing immediate sensory discrepancies and recalibration maintaining an accurate percept by accounting for consistent discrepancies.https://doi.org/10.1371/journal.pone.0290461 |
| spellingShingle | Christoph Kayser Hame Park Herbert Heuer Cumulative multisensory discrepancies shape the ventriloquism aftereffect but not the ventriloquism bias. PLoS ONE |
| title | Cumulative multisensory discrepancies shape the ventriloquism aftereffect but not the ventriloquism bias. |
| title_full | Cumulative multisensory discrepancies shape the ventriloquism aftereffect but not the ventriloquism bias. |
| title_fullStr | Cumulative multisensory discrepancies shape the ventriloquism aftereffect but not the ventriloquism bias. |
| title_full_unstemmed | Cumulative multisensory discrepancies shape the ventriloquism aftereffect but not the ventriloquism bias. |
| title_short | Cumulative multisensory discrepancies shape the ventriloquism aftereffect but not the ventriloquism bias. |
| title_sort | cumulative multisensory discrepancies shape the ventriloquism aftereffect but not the ventriloquism bias |
| url | https://doi.org/10.1371/journal.pone.0290461 |
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