Modulating Attentional Load Affects Numerosity Estimation: Evidence against a Pre-Attentive Subitizing Mechanism

@article{Vetter2008ModulatingAL,
  title={Modulating Attentional Load Affects Numerosity Estimation: Evidence against a Pre-Attentive Subitizing Mechanism},
  author={Petra Vetter and Brian Butterworth and Bahador Bahrami},
  journal={PLoS ONE},
  year={2008},
  volume={3},
  pages={363 - 372}
}
Traditionally, the visual enumeration of a small number of items (1 to about 4), referred to as subitizing, has been thought of as a parallel and pre-attentive process and functionally different from the serial attentive enumeration of larger numerosities. We tested this hypothesis by employing a dual task paradigm that systematically manipulated the attentional resources available to an enumeration task. Enumeration accuracy for small numerosities was severely decreased as more attentional… CONTINUE READING

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