his.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
A Preconscious Neural Mechanism of Hypnotically Altered Colors: A Double Case Study
University of Turku, Finland.
University of Helsinki, Finland.
University of Skövde, School of Humanities and Informatics. University of Skövde, The Systems Biology Research Centre.ORCID iD: 0000-0002-2771-1588
University of Skövde, School of Humanities and Informatics. University of Skövde, The Systems Biology Research Centre.
2013 (English)In: PLoS ONE, ISSN 1932-6203, Vol. 8, no 8, e70900Article in journal (Refereed) Published
Abstract [en]

Hypnotic suggestions may change the perceived color of objects. Given that chromatic stimulus information is processed rapidly and automatically by the visual system, how can hypnotic suggestions affect perceived colors in a seemingly immediate fashion? We studied the mechanisms of such color alterations by measuring electroencephalography in two highly suggestible participants as they perceived briefly presented visual shapes under posthypnotic color alternation suggestions such as "all the squares are blue''. One participant consistently reported seeing the suggested colors. Her reports correlated with enhanced evoked upper beta-band activity (22 Hz) 70-120 ms after stimulus in response to the shapes mentioned in the suggestion. This effect was not observed in a control condition where the participants merely tried to simulate the effects of the suggestion on behavior. The second participant neither reported color alterations nor showed the evoked beta activity, although her subjective experience and event-related potentials were changed by the suggestions. The results indicate a preconscious mechanism that first compares early visual input with a memory representation of the suggestion and consequently triggers the color alteration process in response to the objects specified by the suggestion. Conscious color experience is not purely the result of bottom-up processing but it can be modulated, at least in some individuals, by top-down factors such as hypnotic suggestions.

Place, publisher, year, edition, pages
Public Library of Science , 2013. Vol. 8, no 8, e70900
National Category
Natural Sciences
Research subject
Natural sciences
Identifiers
URN: urn:nbn:se:his:diva-8619DOI: 10.1371/journal.pone.0070900ISI: 000324465000152PubMedID: 23940663Scopus ID: 2-s2.0-84881117166OAI: oai:DiVA.org:his-8619DiVA: diva2:661924
Available from: 2013-11-05 Created: 2013-11-05 Last updated: 2016-04-28Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMedScopusLänk till fulltext

Search in DiVA

By author/editor
Revonsuo, AnttiKallio, Sakari
By organisation
School of Humanities and InformaticsThe Systems Biology Research Centre
In the same journal
PLoS ONE
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 865 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf