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Related Experiment Video

Updated: Jun 22, 2026

How to Create and Use Binocular Rivalry

How to Create and Use Binocular Rivalry

Published on: November 10, 2010

Prismatic lenses shift time perception.

Francesca Frassinetti¹, Barbara Magnani, Massimiliano Oliveri

¹Department of Psychology, University of Bologna, Viale Berti Pichat, 5-40127 Bologna, Italy. francesc.frassinetti@unibo.it

Psychological Science

|June 25, 2009

Summary

This summary is machine-generated.

Time perception is spatially organized, with left-to-right orientation. Prismatic adaptation studies show spatial attention influences time interval estimation, impacting quantity coding.

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Area of Science:

Cognitive Neuroscience
Psychology
Human Perception

Background:

Spatial codes are implicated in the representation of abstract concepts like time and numbers.
Prismatic adaptation is a known method to induce spatial shifts in attention and perception.

Purpose of the Study:

To test the hypothesis that time representation is spatially oriented from left to right.
To investigate if spatial attention modulation influences the perception of time intervals.

Main Methods:

Healthy subjects performed time-reproduction and time-bisection tasks.
Tasks were conducted before and after leftward and rightward prismatic adaptation.

Main Results:

Rightward prismatic adaptation (enhancing rightward spatial attention) led to overestimation of time intervals.
Leftward prismatic adaptation (enhancing leftward spatial attention) led to underestimation of time intervals.

Conclusions:

Temporal intervals are represented in a spatially horizontal (left-to-right) manner.
Spatial attention is a key mechanism modulating time perception and the spatial coding of quantity.