Waving goodbye to contrast: self-generated hand movements attenuate visual sensitivity.
active inference
metacognition
perception
sensory attenuation
sensory sensitivity
virtual reality
Journal
Neuroscience of consciousness
ISSN: 2057-2107
Titre abrégé: Neurosci Conscious
Pays: England
ID NLM: 101679109
Informations de publication
Date de publication:
2019
2019
Historique:
received:
12
09
2018
revised:
19
11
2018
accepted:
28
11
2018
entrez:
29
1
2019
pubmed:
29
1
2019
medline:
29
1
2019
Statut:
epublish
Résumé
It is well known that the human brain continuously predicts the sensory consequences of its own body movements, which typically results in sensory attenuation. Yet, the extent and exact mechanisms underlying sensory attenuation are still debated. To explore this issue, we asked participants to decide which of two visual stimuli was of higher contrast in a virtual reality situation where one of the stimuli could appear behind the participants' invisible moving hand or not. Over two experiments, we measured the effects of such "virtual occlusion" on first-order sensitivity and on metacognitive monitoring. Our findings show that self-generated hand movements reduced the apparent contrast of the stimulus. This result can be explained by the active inference theory. Moreover, sensory attenuation seemed to affect only first-order sensitivity and not (second-order) metacognitive judgments of confidence.
Identifiants
pubmed: 30687519
doi: 10.1093/nc/niy013
pii: niy013
pmc: PMC6342231
doi:
Types de publication
Journal Article
Langues
eng
Pagination
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