Aging and sensitivity to illusory target motion with or without secondary tasks

Alix L. De Dieuleveult (Corresponding Author), Anne Marie Brouwer, Petra C. Siemonsma, Jan B.F. Van Erp, Eli Brenner

    Research output: Contribution to journalArticleAcademicpeer-review

    4 Citations (Scopus)
    35 Downloads (Pure)

    Abstract

    Older individuals seem to find it more difficult to ignore inaccurate sensory cues than younger individuals. We examined whether this could be quantified using an interception task. Twenty healthy young adults (age 18–34) and twenty-four healthy older adults (age 60–82) were asked to tap on discs that were moving downwards on a screen with their finger. Moving the background to the left made the discs appear to move more to the right. Moving the background to the right made them appear to move more to the left. The discs disappeared before the finger reached the screen, so participants had to anticipate how the target would continue to move. We examined how misjudging the disc’s motion when the background moves influenced tapping. Participants received veridical feedback about their performance, so their sensitivity to the illusory motion indicates to what extent they could ignore the task-irrelevant visual information. We expected older adults to be more sensitive to the illusion than younger adults. To investigate whether sensorimotor or cognitive load would increase this sensitivity, we also asked participants to do the task while standing on foam or counting tones. Background motion influenced older adults more than younger adults. The secondary tasks did not increase the background’s influence. Older adults might be more sensitive to the moving background because they find it more difficult to ignore irrelevant sensory information in general, but they may rely more on vision because they have less reliable proprioceptive and vestibular information.
    Original languageEnglish
    Pages (from-to)227-249
    Number of pages23
    JournalMultisensory research
    Volume31
    Issue number3-4
    DOIs
    Publication statusPublished - 1 Jan 2018

    Keywords

    • Activities of daily living
    • Dual task
    • Elderly
    • Healthy aging
    • Sensory integration

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