Hemispheric asymmetry in the auditory facilitation effect in dual-stream rapid serial visual presentation tasks

Yasuhiro Takeshima, Jiro Gyoba

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    Even though auditory stimuli do not directly convey information related to visual stimuli, they often improve visual detection and identification performance. Auditory stimuli often alter visual perception depending on the reliability of the sensory input, with visual and auditory information reciprocally compensating for ambiguity in the other sensory domain. Perceptual processing is characterized by hemispheric asymmetry. While the left hemisphere is more involved in linguistic processing, the right hemisphere dominates spatial processing. In this context, we hypothesized that an auditory facilitation effect in the right visual field for the target identification task, and a similar effect would be observed in the left visual field for the target localization task. In the present study, we conducted target identification and localization tasks using a dual-stream rapid serial visual presentation. When two targets are embedded in a rapid serial visual presentation stream, the target detection or discrimination performance for the second target is generally lower than for the first target; this deficit is well known as attentional blink. Our results indicate that auditory stimuli improved target identification performance for the second target within the stream when visual stimuli were presented in the right, but not the left visual field. In contrast, auditory stimuli improved second target localization performance when visual stimuli were presented in the left visual field. An auditory facilitation effect was observed in perceptual processing, depending on the hemispheric specialization. Our results demonstrate a dissociation between the lateral visual hemifield in which a stimulus is projected and the kind of visual judgment that may benefit from the presentation of an auditory cue.

    Original languageEnglish
    Article numbere104131
    JournalPloS one
    Volume9
    Issue number8
    DOIs
    Publication statusPublished - 2014 Aug 13

    ASJC Scopus subject areas

    • Biochemistry, Genetics and Molecular Biology(all)
    • Agricultural and Biological Sciences(all)
    • General

    Fingerprint Dive into the research topics of 'Hemispheric asymmetry in the auditory facilitation effect in dual-stream rapid serial visual presentation tasks'. Together they form a unique fingerprint.

    Cite this