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Published on: February 19, 2018
Exploring the mental number line via the size congruity effect
Michal Pinhas1, Joseph Tzelgov, Ifate Guata-Yaakobi
1Department of Psychology, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel. pinchas@bgu.ac.il
Summary
The size effect in number comparison is linked to automatic number processing. This suggests that our understanding of numbers is based on an inherent mental number line.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Numerical Cognition
Background:
- The size effect describes faster comparison of smaller numbers than larger numbers.
- The underlying cognitive mechanisms of the size effect are debated.
- Automatic number processing is a key area of investigation.
Purpose of the Study:
- To investigate the role of automatic number processing in the numerical size effect.
- To differentiate between numerical and quantity comparison tasks.
- To provide evidence for the mental number line theory.
Main Methods:
- Participants completed a quantity comparison task involving sketched cups.
- Irrelevant numbers were superimposed on the cups.
- Congruent and incongruent conditions manipulated number-size relationships.
- A numerical comparison task was also performed.
Main Results:
- The size effect was observed in the numerical comparison task.
- In the quantity task, the size congruity effect diminished with increasing irrelevant number magnitude.
- This indicates a modulation of the size effect by task demands.
Conclusions:
- The findings support the notion that the size effect is a fundamental aspect of mental number representation.
- Automatic processing of numerical magnitude influences comparison tasks.
- The mental number line is a core component of numerical cognition.
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