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Is a change as good as a rest? Effects of inter-trial contingency and task on concurrent sound segregation
journal contribution
posted on 2023-06-08, 19:33 authored by Benjamin Dyson, Claude AlainThe effects of local and global context on concurrent sound segregation were examined using a mistuned harmonic paradigm. Presented with the same sounds over three conditions, participants were asked to either categorise the incoming complex according to pitch or harmonicity (active listening) or watch a muted subtitled movie of their choice (passive listening). Global context was defined according to task instruction, while local context was defined relative to the repetition or change of harmonicity across trials. An interaction between global and local context in both behavioural and event-related potential measures was found, with participants showing sensitivity to change and repetition in harmonicity when it was task-relevant, in addition to enhanced P3 amplitude for cases where a tuned stimulus changed into a mistuned stimulus over consecutive trials. The data are discussed in terms of current models of concurrent sound perception and how top–down processes might influence these mechanisms.
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Publication status
- Published
File Version
- Published version
Journal
Brain ResearchISSN
0006-8993Publisher
ElsevierExternal DOI
Volume
1189Page range
135-144Department affiliated with
- Psychology Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2015-01-14First Compliant Deposit (FCD) Date
2015-01-14Usage metrics
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