Neural association between non-verbal number sense and arithmetic fluency

Area of Science:

• Cognitive Neuroscience
• Neuroscience
• Psychology

Background:

• Non-verbal number sense correlates with arithmetic fluency.
• Behavioral studies suggest visual perception underpins this association.
• Neural mechanisms remain under-investigated.

Purpose of the Study:

• To investigate the neural association between non-verbal number sense, arithmetic fluency, and visual perception.
• To test the hypothesis of a shared neural mechanism in the occipital cortex.
• To explore the role of visual perception in numerical cognition and arithmetic.

Main Methods:

• Event-related potentials (ERPs) were analyzed during five cognitive tasks.
• Tasks included arithmetic (addition, subtraction), numerosity comparison, figure matching, and character rhyming.
• A single-trial ERP-behavior correlation approach was employed.

Main Results:

• The N1 component of ERPs correlated with reaction time at occipital electrodes across most tasks.
• N1 component activity linked arithmetic fluency and character rhyming to numerosity comparison and figure matching.
• Significant neural associations were found in the occipital cortex.

Conclusions:

• Neural associations exist between arithmetic fluency, non-verbal number sense, and visual perception in the occipital cortex.
• Visual perception serves as a shared neural mechanism for both non-verbal number sense and arithmetic fluency.
• Findings support the visual perception account of numerical cognition and arithmetic skills.