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This summary is machine-generated.

Individuals with autism spectrum disorder may have weaker global grouping mechanisms. This study found that higher autistic traits in neurotypical adults correlated with reduced underestimation of numerosity, suggesting altered perceptual processing.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Autism Research

Background:

  • Individuals with autism spectrum disorder (ASD) often exhibit a local rather than global perceptual style.
  • Understanding perceptual biases in ASD is crucial for developing targeted interventions.
  • Autistic-like traits in neurotypical adults can serve as a model to investigate ASD-related cognitive differences.

Purpose of the Study:

  • To investigate the relationship between autistic-like personality traits and grouping-induced response biases in numerosity judgments.
  • To explore how global perceptual processing is affected by autistic traits.

Main Methods:

  • A novel experimental paradigm was employed using clouds of dot-pairs connected by thin lines.
  • Participants judged the numerosity of these dot configurations.
  • The autism-spectrum quotient (AQ) was used to quantify autistic-like traits.

Main Results:

  • A significant negative correlation was found between the underestimation bias and the autism-spectrum quotient (r = 0.72).
  • Participants with higher autistic traits showed a weaker underestimation bias.
  • The results indicate that global grouping mechanisms, which cause this bias, are less effective in individuals with higher autistic traits.

Conclusions:

  • Global grouping mechanisms, activated by connecting elements, appear to be weaker in individuals with high autistic-like traits.
  • This finding supports the hypothesis of local over global processing in autism spectrum disorder.
  • The study provides novel insights into the perceptual characteristics associated with autistic traits.