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Small number preference in guiding attention.

Yong-Chun Cai1, Shuang-Xia Li

  • 1Department of Psychology and Behavioral Sciences, Xixi Campus, Zhejiang University, 148 Tianmushan Road, Hangzhou, 310028, People's Republic of China, yccai@zju.edu.cn.

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Summary
This summary is machine-generated.

Healthy individuals show a bias toward small numbers, possibly due to a leftward spatial representation. This study found that small numbers capture visual attention faster, with differing mechanisms based on educational background.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Numerical Cognition

Background:

  • Healthy individuals often exhibit a bias towards smaller numbers in tasks like number bisection or sequence generation.
  • This small number preference is hypothesized to stem from a left-to-right spatial representation of numbers on a mental number line.
  • The leftward bias in this spatial representation is thought to underlie the preference for small numbers.

Purpose of the Study:

  • To investigate whether small numbers capture visual attention more effectively than larger numbers.
  • To explore the role of perceptual processing in the small number preference.
  • To determine if educational background influences the mechanisms behind the small number preference.

Main Methods:

  • Participants performed a target detection task where the target was pre-cued by either a small or a large number.
  • Response times were measured to assess attentional allocation.
  • Correlations were examined between performance on the attention task, a random number generation task, and hand preference (left-hand vs. right-hand responding).

Main Results:

  • Response times were significantly faster when targets were pre-cued by small numbers compared to large numbers, indicating preferential allocation of visual attention to small numbers.
  • For science and engineering participants, this small number preference was amplified by left-hand responding and correlated with a random number generation bias, suggesting a spatial representation.
  • Liberal arts participants did not show enhanced small number preference with left-hand responding, nor correlations with random number generation, indicating non-spatial processing.

Conclusions:

  • The small number preference emerges early, at the perceptual processing stage.
  • Distinct cognitive mechanisms underlie the small number preference in individuals with different educational backgrounds.
  • Spatial biases influence numerical cognition for science/engineering students, while non-spatial factors are more relevant for liberal arts students.