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- Publisher Website: 10.1093/schbul/sbab099
- Scopus: eid_2-s2.0-85119626756
- PMID: 34420057
- WOS: WOS:000715376600005
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Article: Range-Adaptive Value Representation in Different Stages of Schizophrenia: A Proof of Concept Study
Title | Range-Adaptive Value Representation in Different Stages of Schizophrenia: A Proof of Concept Study |
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Authors | |
Keywords | Range adaptive coding Range adaptation Value representation Amotivation Schizophrenia |
Issue Date | 2021 |
Publisher | Oxford University Press. The Journal's web site is located at http://schizophreniabulletin.oxfordjournals.org/ |
Citation | Schizophrenia Bulletin, 2021, v. 47 n. 6, p. 1524-1533 How to Cite? |
Abstract | Amotivation is related to value representation. A comprehensive account of amotivation requires a mechanistic understanding of how the brain exploits external information to represent value. To achieve maximal value discriminability, brain valuation system will dynamically adapt its coding sensitivity to the range of values available in any given condition, so-called range adaptive coding. We administered an experimental task to 30 patients with chronic schizophrenia (C-SCZ), 30 first-episode schizophrenia (FE-SCZ), 34 individuals with high social anhedonia (HSoA), and their paired controls to assess range adaptation ability. C-SCZ patients exhibited over-adaptation and their performances were negatively correlated with avolition symptoms and positive symptoms and positively correlated with blunted-affect symptoms and self-reported consummatory interpersonal pleasure scores, though the results were non-significant. FE-SCZ patients exhibited reduced adaptation, which was significantly and negatively correlated with avolition symptoms and positively correlated with the overall proportion of choosing to exert more effort. Although HSoA participants exhibited comparable range adaptation to controls, their performances were significantly and negatively correlated with the proportion of choosing to exert more effort under the lowest value condition. Our results suggest that different stages of schizophrenia spectrum showed distinct range adaptation patterns. Range adaptation impairments may index a possible underlying mechanism for amotivation symptoms in FE-SCZ and more complicated and pervasive effects on clinical symptoms in C-SCZ. |
Persistent Identifier | http://hdl.handle.net/10722/304002 |
ISSN | 2023 Impact Factor: 5.3 2023 SCImago Journal Rankings: 2.249 |
PubMed Central ID | |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Wang, LL | - |
dc.contributor.author | Lam, CYT | - |
dc.contributor.author | Huang, J | - |
dc.contributor.author | Cheung, EFC | - |
dc.contributor.author | Lui, SSY | - |
dc.contributor.author | Chan, RCK | - |
dc.date.accessioned | 2021-09-23T08:53:52Z | - |
dc.date.available | 2021-09-23T08:53:52Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Schizophrenia Bulletin, 2021, v. 47 n. 6, p. 1524-1533 | - |
dc.identifier.issn | 0586-7614 | - |
dc.identifier.uri | http://hdl.handle.net/10722/304002 | - |
dc.description.abstract | Amotivation is related to value representation. A comprehensive account of amotivation requires a mechanistic understanding of how the brain exploits external information to represent value. To achieve maximal value discriminability, brain valuation system will dynamically adapt its coding sensitivity to the range of values available in any given condition, so-called range adaptive coding. We administered an experimental task to 30 patients with chronic schizophrenia (C-SCZ), 30 first-episode schizophrenia (FE-SCZ), 34 individuals with high social anhedonia (HSoA), and their paired controls to assess range adaptation ability. C-SCZ patients exhibited over-adaptation and their performances were negatively correlated with avolition symptoms and positive symptoms and positively correlated with blunted-affect symptoms and self-reported consummatory interpersonal pleasure scores, though the results were non-significant. FE-SCZ patients exhibited reduced adaptation, which was significantly and negatively correlated with avolition symptoms and positively correlated with the overall proportion of choosing to exert more effort. Although HSoA participants exhibited comparable range adaptation to controls, their performances were significantly and negatively correlated with the proportion of choosing to exert more effort under the lowest value condition. Our results suggest that different stages of schizophrenia spectrum showed distinct range adaptation patterns. Range adaptation impairments may index a possible underlying mechanism for amotivation symptoms in FE-SCZ and more complicated and pervasive effects on clinical symptoms in C-SCZ. | - |
dc.language | eng | - |
dc.publisher | Oxford University Press. The Journal's web site is located at http://schizophreniabulletin.oxfordjournals.org/ | - |
dc.relation.ispartof | Schizophrenia Bulletin | - |
dc.subject | Range adaptive coding | - |
dc.subject | Range adaptation | - |
dc.subject | Value representation | - |
dc.subject | Amotivation | - |
dc.subject | Schizophrenia | - |
dc.title | Range-Adaptive Value Representation in Different Stages of Schizophrenia: A Proof of Concept Study | - |
dc.type | Article | - |
dc.identifier.email | Lam, CYT: lyt316@hku.hk | - |
dc.identifier.email | Lui, SSY: lsy570@hku.hk | - |
dc.identifier.authority | Lui, SSY=rp02747 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1093/schbul/sbab099 | - |
dc.identifier.pmid | 34420057 | - |
dc.identifier.pmcid | PMC8530390 | - |
dc.identifier.scopus | eid_2-s2.0-85119626756 | - |
dc.identifier.hkuros | 325262 | - |
dc.identifier.volume | 47 | - |
dc.identifier.issue | 6 | - |
dc.identifier.spage | 1524 | - |
dc.identifier.epage | 1533 | - |
dc.identifier.isi | WOS:000715376600005 | - |
dc.publisher.place | United Kingdom | - |