- Title
- Not so primitive: context-sensitive meta-learning about unattended sound sequences
- Creator
- Todd, Juanita; Provost, Alexander; Whitson, Lisa R.; Cooper, Gavin; Heathcote, Andrew
- Relation
- NHMRC.1002995 http://purl.org/au-research/grants/nhmrc/1002995
- Relation
- Journal of Neurophysiology Vol. 109, Issue 1, p. 99-105
- Publisher Link
- http://dx.doi.org/10.1152/jn.00581.2012
- Publisher
- American Physiological Society
- Resource Type
- journal article
- Date
- 2013
- Description
- Mismatch negativity (MMN), an evoked response potential elicited when a “deviant” sound violates a regularity in the auditory environment, is integral to auditory scene processing and has been used to demonstrate “primitive intelligence” in auditory short-term memory. Using a new multiple-context and -timescale protocol we show that MMN magnitude displays a context-sensitive modulation depending on changes in the probability of a deviant at multiple temporal scales. We demonstrate a primacy bias causing asymmetric evidence-based modulation of predictions about the environment, and we demonstrate that learning how to learn about deviant probability (meta-learning) induces context-sensitive variation in the accessibility of predictive long-term memory representations that underpin the MMN. The existence of the bias and meta-learning are consistent with automatic attributions of behavioral salience governing relevance-filtering processes operating outside of awareness.
- Subject
- mismatch negativity; perceptual inference; salience; learning; auditory evoked potential
- Identifier
- http://hdl.handle.net/1959.13/1061221
- Identifier
- uon:16911
- Identifier
- ISSN:0022-3077
- Language
- eng
- Full Text
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