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Related Experiment Video

Updated: Oct 4, 2025

Generating Strictly Controlled Stimuli for Figure Recognition Experiments

Generating Strictly Controlled Stimuli for Figure Recognition Experiments

Published on: March 18, 2019

Separate processing mechanisms for spatial-numerical compatibility and numerical-size congruity.

James E Vellan¹, Craig Leth-Steensen¹

¹Department of Psychology.

Canadian Journal of Experimental Psychology = Revue Canadienne De Psychologie Experimentale

|February 10, 2022

Summary

This study investigated how number magnitude and physical size interact with spatial response codes. Findings reveal independent size congruity effect and spatial-numerical association of response codes effects, with a spatial-size association of response codes effect emerging under specific conditions.

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Area of Science:

Cognitive psychology
Human-computer interaction
Numerical cognition

Background:

The interplay between numerical magnitude, physical size, and spatial response associations is complex.
Understanding these interactions is crucial for developing accurate computational models of cognitive processing.

Purpose of the Study:

To investigate the size congruity effect (SiCE), spatial-numerical association of response codes (SNARC), and spatial-size association of response codes (SSARC) effects.
To examine how these effects operate independently or interact across different experimental conditions.
To constrain computational models by analyzing congruency and compatibility effects.

Main Methods:

Two experiments were conducted using single digits presented in varying font sizes.
Participants judged numerical magnitude and physical size using horizontally and/or vertically aligned manual responses.
Simultaneous examination of SiCE, SNARC, and SSARC effects was performed.

Main Results:

Experiment 1: Independent SiCE and SNARC effects were observed; no SSARC effect.
Experiment 2 (numerical magnitude): Separate SiCE and SNARC effects.
Experiment 2 (physical size): Separate SiCE and SSARC effects.

Conclusions:

Findings suggest distinct mechanisms underlie the investigated effects.
Results provide critical constraints for developing comprehensive computational models of cognitive processing.
The study advances our understanding of the complex relationships between stimulus properties and response selection.