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A Two-interval Forced-choice Task for Multisensory Comparisons

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Published on: November 9, 2018

Number-time interaction: Search for a common magnitude system in a cross-modal setting.

Anuj Shukla^1,2, Raju S Bapi¹

¹Cognitive Science Lab, Kohli Centre on Intelligent Systems, International Institute of Information Technology, Hyderabad, Telangana, India.

Frontiers in Behavioral Neuroscience

|September 12, 2022

Summary

Visual numbers influence auditory temporal processing only when task-relevant, suggesting cognitive mechanisms like attention, not a common magnitude system, underlie cross-modal interactions.

Keywords:

ATOM common magnitude system cross-modal magnitude processing number-time interactions time perception and temporal effects

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Published on: July 26, 2013

Area of Science:

Cognitive Neuroscience
Cross-modal Perception
Magnitude Processing

Background:

The A Theory of Magnitude (ATOM) posits a generalized brain system for processing magnitudes like space, time, and numbers.
Existing evidence for ATOM primarily relies on visual presentation of numerical and temporal information.
Cross-modal integration of magnitude information, especially from visual numbers to auditory time, remains underexplored.

Purpose of the Study:

To investigate the cross-modal influence of visual numerical magnitude on auditory temporal processing.
To determine if the ATOM framework extends to integrating cross-modal magnitude information.
To examine the role of task-relevance and temporal proximity in cross-modal magnitude interactions.

Main Methods:

Three experiments employed a temporal bisection task with auditory tones.
Visual numerical magnitude information was presented concurrently with, or prior to, auditory temporal judgments.
Task-relevance of numerical magnitude was manipulated across experiments.

Main Results:

Visual numerical magnitude influenced auditory temporal processing only when numbers were task-relevant and simultaneously available (Experiments 1 and 3).
No significant influence was observed when numerical and temporal information were temporally separated (Experiment 2).
Findings suggest task-relevance is crucial for cross-modal magnitude effects.

Conclusions:

Cross-modal influence of visual numbers on auditory temporal processing may not stem from a shared magnitude system.
General cognitive mechanisms, such as attention and working memory, likely mediate these cross-modal effects.
The ATOM framework's applicability to cross-modal magnitude integration requires further investigation, particularly concerning attentional and memory load.