Learning to associate auditory and visual stimuli: behavioral and neural mechanisms.

Abstract:

:The ability to effectively combine sensory inputs across modalities is vital for acquiring a unified percept of events. For example, watching a hammer hit a nail while simultaneously identifying the sound as originating from the event requires the ability to identify spatio-temporal congruencies and statistical regularities. In this study, we applied a reaction time and hazard function measure known as capacity (e.g., Townsend and AshbyCognitive Theory 200-239, 1978) to quantify the extent to which observers learn paired associations between simple auditory and visual patterns in a model theoretic manner. As expected, results showed that learning was associated with an increase in accuracy, but more significantly, an increase in capacity. The aim of this study was to associate capacity measures of multisensory learning, with neural based measures, namely mean global field power (GFP). We observed a co-variation between an increase in capacity, and a decrease in GFP amplitude as learning occurred. This suggests that capacity constitutes a reliable behavioral index of efficient energy expenditure in the neural domain.

journal_name

Brain Topogr

journal_title

Brain topography

authors

Altieri N,Stevenson RA,Wallace MT,Wenger MJ

doi

10.1007/s10548-013-0333-7

subject

Has Abstract

pub_date

2015-05-01 00:00:00

pages

479-93

issue

3

eissn

0896-0267

issn

1573-6792

journal_volume

28

pub_type

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