Abstract:
:Older adults have altered perception of the relative timing between auditory and visual stimuli, even when stimuli are scaled to equate detectability. To help understand why, this study investigated the neural correlates of audiovisual synchrony judgments in older adults using electroencephalography (EEG). Fourteen younger (18-32 year old) and 16 older (61-74 year old) adults performed an audiovisual synchrony judgment task on flash-pip stimuli while EEG was recorded. All participants were assessed to have healthy vision and hearing for their age. Observers responded to whether audiovisual pairs were perceived as synchronous or asynchronous via a button press. The results showed that the onset of predictive sensory information for synchrony judgments was not different between groups. Channels over auditory areas contributed more to this predictive sensory information than visual areas. The spatial-temporal profile of the EEG activity also indicates that older adults used different resources to maintain a similar level of performance in audiovisual synchrony judgments compared with younger adults.
journal_name
Neurobiol Agingjournal_title
Neurobiology of agingauthors
Chan YM,Pianta MJ,Bode S,McKendrick AMdoi
10.1016/j.neurobiolaging.2017.03.011subject
Has Abstractpub_date
2017-07-01 00:00:00pages
38-48eissn
0197-4580issn
1558-1497pii
S0197-4580(17)30082-9journal_volume
55pub_type
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