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Summary

This summary is machine-generated.

This study explored how Arabic speakers process two-digit numbers across different numeral systems. Findings suggest an abstract magnitude representation exists, regardless of notation, influencing numerical and physical comparisons.

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Area of Science:

Cognitive Psychology
Numerical Cognition
Cross-Cultural Psychology

Background:

Arabic speakers utilize both Arabic and Indian numerical symbols.
Understanding numerical processing across different notations is crucial for cognitive science.
Previous research established effects of numerical properties on comparison tasks with Arabic digits.

Purpose of the Study:

To investigate the existence of across-notation automatic numerical processing of two-digit numbers.
To examine how numerical and physical comparison tasks are influenced by number notation.
To determine if a common abstract representation of magnitude exists for numbers presented in different notations.

Main Methods:

Utilized size comparison tasks involving pairs of two-digit numbers.
Participants were Arabic speakers, presented with numbers in same-notation and mixed-notation pairs.
Measured response times and accuracy in numerical and physical comparison tasks.

Main Results:

Numerical comparison was affected by decade difference, unit-decade compatibility, and global distance, consistent across notations.
Physical comparison showed a size congruency effect (SiCE), influenced by unit-decade compatibility but not global distance.
The SiCE suggests automatic translation of unit and decade digits into a common magnitude representation.

Conclusions:

Results support the existence of an abstract representation of numerical magnitude, independent of specific notation.
This abstract representation is accessed automatically during number processing.
Unit-decade compatibility plays a role in forming this abstract magnitude representation.