Cross-Modal Aftereffects of Visuo-Manual Prism Adaptation: Transfer to Auditory Divided Attention in Healthy Subjects
Catégorie
Journal Article
Auteurs
Bonnet, C., Poulin-Charronnat, B., Vinot, C., Bard, P., Michel, C.
Année
2022
Titre
Cross-Modal Aftereffects of Visuo-Manual Prism Adaptation: Transfer to Auditory Divided Attention in Healthy Subjects
Journal / Livre / Conférence
Neuropsychology
Résumé
Objective: Prism adaptation was shown to modify auditory perception. Using a dichotic listening task,
which assesses auditory divided attention, benefits of a rightward prism adaptation were demonstrated in
neglect patients (i.e., a syndrome following right hemisphere brain damage) by reducing their left auditory
extinction. It is currently unknown whether prism adaptation affects auditory divided attention in healthy
subjects. In the present study, we investigated the aftereffects of prism adaptation on dichotic listening.
Method: A sample of 47 young adults performed a dichotic listening task, in which pairs of words were
presented with two words sounded simultaneously, one in each ear. Three parameters were measured: The
percentage of recalled words, the percentage of correctly recalled words, and the laterality index (LI).
Results: Prism adaptation to a leftward optical deviation (L-PA) significantly increased the overall
percentage of recalled words (p = .044) and that from the right ear ( p = .002), and the overall LI
(p = .049). Conclusions: For the first time, these findings demonstrate that L-PA produced an orientation of
the auditory divided attention in favor of the right ear in healthy participants. This asymmetrical aftereffect
provides a new argument in favor of the cross-modal dimension of prism adaptation, although an
acclimatization effect of the dichotic listening task is also discussed. Our study opens up a new avenue
for using prism adaptation in the field of auditory rehabilitation requiring a modulation of auditory attention.
Issue
1
Volume
36
Pages
64-74
Mots-clés
prism adaptation, dichotic listening, auditory divided attention, cross-modal aftereffects