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Related Experiment Video

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Methods to Test Visual Attention Online
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Can faces affect object-based attention? Evidence from online experiments.

Tong Xie1,2, Shimin Fu3, Giovanni Mento1

  • 1Department of General Psychology, University of Padova, Padova, Italy.

Attention, Perception & Psychophysics
|April 9, 2022
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Summary

Human faces do not trigger object-based attention (OBA) like other objects. A horizontal attention bias can interfere with OBA, but this study developed a method to measure OBA accurately.

Keywords:
Double-rectangle paradigmFacesHorizontal biasObject-based attention

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Area of Science:

  • Cognitive Psychology
  • Visual Attention Research
  • Human Perception Studies

Background:

  • Object-based attention (OBA) is a key mechanism in visual processing, allowing focus on entire objects.
  • Previous research indicates that salient stimuli, like faces, can capture attention, but their effect on OBA is not fully understood.
  • The double-rectangle paradigm is a common method for investigating OBA.

Purpose of the Study:

  • To investigate whether human faces elicit the object-based attention (OBA) effect within the double-rectangle paradigm.
  • To examine the influence of horizontal attention bias on OBA when faces are stimuli.
  • To develop a refined method for measuring OBA, free from confounding attentional biases.

Main Methods:

  • Two online experiments utilized a modified double-rectangle paradigm.
  • Participants responded to stimuli, with response times (RTs) recorded.
  • Experiment 2 specifically measured and controlled for horizontal attention bias.

Main Results:

  • Human faces did not elicit the OBA effect, unlike non-face objects.
  • Longer response times were observed when attention was directed towards faces compared to non-face objects.
  • A significant horizontal attention bias was identified, influencing OBA, particularly with vertically oriented stimuli.

Conclusions:

  • Faces do not confer the same-object advantage in the double-rectangle paradigm.
  • The presence of a horizontal attention bias can mask or alter the OBA effect.
  • A novel methodology was established to accurately measure OBA, mitigating the impact of horizontal bias.