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A Two-interval Forced-choice Task for Multisensory Comparisons

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Numerical Context and Time Perception: Contrast Effects and the Perceived Duration of Numbers.

Doug Alards-Tomalin¹, Alexander C Walker², Alexa Kravetz²

¹Department of Psychology, University of Manitoba, Winnipeg, Canada Douglas.Alards-Tomalin@umanitoba.ca.

|November 13, 2015

Summary

Large numbers seem to last longer than small numbers, influencing time perception. Contextual number format (symbolic or nonsymbolic) affects this time-magnitude bias, especially for larger targets.

Keywords:

Number context magnitude numerosity time perception

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Area of Science:

Cognitive Psychology
Numerical Cognition
Time Perception

Background:

The perception of time can be influenced by various cognitive factors.
Magnitude information, whether symbolic or nonsymbolic, plays a role in cognitive processing.

Purpose of the Study:

To investigate the impact of contextual magnitude information on perceived duration.
To examine how symbolic (Arabic digits) and nonsymbolic (numerosities) formats influence time-magnitude biases.

Main Methods:

Participants judged the duration of target numbers.
Contextual magnitude information (symbolic or nonsymbolic) was presented prior to the target number.
The notation of the context and target numbers were varied.

Main Results:

A time-magnitude bias was observed: larger magnitude targets were perceived as lasting longer.
Context effects influenced perceived duration, with greater magnitude discrepancies leading to longer duration ratings.
This effect was asymmetrical, primarily occurring for large magnitude targets, and depended on notation congruence between context and target.

Conclusions:

Perceived duration is susceptible to a time-magnitude bias, influenced by numerical magnitude.
Contextual magnitude information, irrespective of notation, modulates time perception.
Notation congruence between context and target influences the manifestation of context effects in time perception.