Related Experiment Video
Updated: Jul 15, 2026
11:39
Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
Published on: September 7, 2022
Auditory processing in an inter-modal oddball task: effects of a combined auditory/visual standard on auditory target
Christopher R Brown1, Adam R Clarke, Robert J Barry
1Brain & Behaviour Research Institute and School of Psychology, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia. crb04@ouw.edu.au
Summary
This study shows that early auditory processing is unaffected by visual stimuli, but later stages (after 200 ms) are influenced by both auditory and visual information, confirming two distinct processing stages.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Auditory Perception
Background:
- Previous research suggests auditory target processing involves distinct early modality-specific and later context-dependent stages.
- Early event-related potential (ERP) components are primarily affected by intra-modal processes.
- Later ERP components (200-400 ms) are influenced by both inter-modal and intra-modal processes.
Purpose of the Study:
- To investigate the impact of simultaneously presented visual standard stimuli on auditory target processing.
- To determine if visual standards alter early and late event-related potential (ERP) components in an auditory oddball task.
- To further elucidate the modality-specific and context-dependent stages of auditory target detection.
Main Methods:
- An auditory-visual oddball task with combined auditory-visual standards and infrequent auditory targets was employed.
- Event-related potentials (ERPs) to auditory targets were recorded.
- ERPs from the auditory-visual task were compared to those from an auditory-only oddball task with identical auditory stimuli.
Main Results:
- Early ERP components (N100, P200, N200) did not differ significantly between the auditory-visual and auditory-only tasks.
- Later ERP components (P250, P300, P350) were larger and exhibited topographic differences in the auditory-visual task.
- These later differences suggest the involvement of separate inter-modal and intra-modal processes.
Conclusions:
- Auditory target processing occurs in at least two distinct stages.
- An early stage (up to 200 ms) is modality-dependent and unaffected by concurrent visual stimuli.
- A later stage is context-dependent, integrating information from both auditory and visual modalities.
