The role of multisensory memories in unisensory object discrimination.

Détails

ID Serval
serval:BIB_1286AFC99414
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
The role of multisensory memories in unisensory object discrimination.
Périodique
Brain research. Cognitive brain research
Auteur⸱e⸱s
Lehmann S., Murray M.M.
ISSN
0926-6410
Statut éditorial
Publié
Date de publication
2005
Peer-reviewed
Oui
Volume
24
Numéro
2
Pages
326-34
Langue
anglais
Notes
Publication types: Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't - Publication Status: ppublish
Résumé
Past multisensory experiences can influence current unisensory processing and memory performance. Repeated images are better discriminated if initially presented as auditory-visual pairs, rather than only visually. An experience's context thus plays a role in how well repetitions of certain aspects are later recognized. Here, we investigated factors during the initial multisensory experience that are essential for generating improved memory performance. Subjects discriminated repeated versus initial image presentations intermixed within a continuous recognition task. Half of initial presentations were multisensory, and all repetitions were only visual. Experiment 1 examined whether purely episodic multisensory information suffices for enhancing later discrimination performance by pairing visual objects with either tones or vibrations. We could therefore also assess whether effects can be elicited with different sensory pairings. Experiment 2 examined semantic context by manipulating the congruence between auditory and visual object stimuli within blocks of trials. Relative to images only encountered visually, accuracy in discriminating image repetitions was significantly impaired by auditory-visual, yet unaffected by somatosensory-visual multisensory memory traces. By contrast, this accuracy was selectively enhanced for visual stimuli with semantically congruent multisensory pasts and unchanged for those with semantically incongruent multisensory pasts. The collective results reveal opposing effects of purely episodic versus semantic information from auditory-visual multisensory events. Nonetheless, both types of multisensory memory traces are accessible for processing incoming stimuli and indeed result in distinct visual object processing, leading to either impaired or enhanced performance relative to unisensory memory traces. We discuss these results as supporting a model of object-based multisensory interactions.
Mots-clé
Acoustic Stimulation, Adult, Analysis of Variance, Auditory Perception, Discrimination (Psychology), Female, Humans, Male, Photic Stimulation, Reaction Time, Recognition (Psychology), Visual Perception
Pubmed
Web of science
Création de la notice
21/01/2008 10:23
Dernière modification de la notice
20/08/2019 12:40
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