Unreliable Evidence: 2 Sources of Uncertainty During Perceptual Choice.
Perceptual decisions often involve integrating evidence from multiple concurrently available sources. Uncertainty arises when the integrated (mean) evidence fails to support one alternative over another. However, evidence heterogeneity (variability) also provokes uncertainty. Here, we asked whether...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2013
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| _version_ | 1797083576171233280 |
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| author | Michael, E de Gardelle, V Nevado-Holgado, A Summerfield, C |
| author_facet | Michael, E de Gardelle, V Nevado-Holgado, A Summerfield, C |
| author_sort | Michael, E |
| collection | OXFORD |
| description | Perceptual decisions often involve integrating evidence from multiple concurrently available sources. Uncertainty arises when the integrated (mean) evidence fails to support one alternative over another. However, evidence heterogeneity (variability) also provokes uncertainty. Here, we asked whether these 2 sources of uncertainty have independent behavioral and neural effects during choice. Human observers undergoing functional neuroimaging judged the average color or shape of a multielement array. The mean and variance of the feature values exerted independent influences on behavior and brain activity. Surprisingly, BOLD signals in the dorsomedial prefrontal cortex (dmPFC) showed polar opposite responses to the 2 sources of uncertainty, with the strongest response to ambiguous tallies of evidence (high mean uncertainty) and to homogenous arrays (low variance uncertainty). These findings present a challenge for models that emphasize the role of the dmPFC in detecting conflict, errors, or surprise. We suggest an alternative explanation, whereby evidence is processed with increased gain near the category boundary. |
| first_indexed | 2024-03-07T01:43:26Z |
| format | Journal article |
| id | oxford-uuid:979abbde-e44f-4466-a165-1acf3f94e615 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:43:26Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:979abbde-e44f-4466-a165-1acf3f94e6152022-03-27T00:01:04ZUnreliable Evidence: 2 Sources of Uncertainty During Perceptual Choice.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:979abbde-e44f-4466-a165-1acf3f94e615EnglishSymplectic Elements at Oxford2013Michael, Ede Gardelle, VNevado-Holgado, ASummerfield, CPerceptual decisions often involve integrating evidence from multiple concurrently available sources. Uncertainty arises when the integrated (mean) evidence fails to support one alternative over another. However, evidence heterogeneity (variability) also provokes uncertainty. Here, we asked whether these 2 sources of uncertainty have independent behavioral and neural effects during choice. Human observers undergoing functional neuroimaging judged the average color or shape of a multielement array. The mean and variance of the feature values exerted independent influences on behavior and brain activity. Surprisingly, BOLD signals in the dorsomedial prefrontal cortex (dmPFC) showed polar opposite responses to the 2 sources of uncertainty, with the strongest response to ambiguous tallies of evidence (high mean uncertainty) and to homogenous arrays (low variance uncertainty). These findings present a challenge for models that emphasize the role of the dmPFC in detecting conflict, errors, or surprise. We suggest an alternative explanation, whereby evidence is processed with increased gain near the category boundary. |
| spellingShingle | Michael, E de Gardelle, V Nevado-Holgado, A Summerfield, C Unreliable Evidence: 2 Sources of Uncertainty During Perceptual Choice. |
| title | Unreliable Evidence: 2 Sources of Uncertainty During Perceptual Choice. |
| title_full | Unreliable Evidence: 2 Sources of Uncertainty During Perceptual Choice. |
| title_fullStr | Unreliable Evidence: 2 Sources of Uncertainty During Perceptual Choice. |
| title_full_unstemmed | Unreliable Evidence: 2 Sources of Uncertainty During Perceptual Choice. |
| title_short | Unreliable Evidence: 2 Sources of Uncertainty During Perceptual Choice. |
| title_sort | unreliable evidence 2 sources of uncertainty during perceptual choice |
| work_keys_str_mv | AT michaele unreliableevidence2sourcesofuncertaintyduringperceptualchoice AT degardellev unreliableevidence2sourcesofuncertaintyduringperceptualchoice AT nevadoholgadoa unreliableevidence2sourcesofuncertaintyduringperceptualchoice AT summerfieldc unreliableevidence2sourcesofuncertaintyduringperceptualchoice |