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Target grouping in visual search for multiple digits.

Kenith V Sobel1, Amrita M Puri, Jared Hogan

  • 1Department of Psychology and Counseling, University of Central Arkansas, 201 Donaghey Ave., Mashburn Hall 260, Conway, AR, 72035, USA, k.sobel@mac.com.

Attention, Perception & Psychophysics
|August 27, 2014
PubMed
Summary
This summary is machine-generated.

Search for multiple target digits is fastest when targets are grouped closely on the number line. This contiguity and coherence effect in visual search was confirmed across four experiments.

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Area of Science:

  • Cognitive Psychology
  • Visual Perception
  • Human Information Processing

Background:

  • Understanding visual search is crucial for explaining how humans process information.
  • Previous research suggests factors like numerical magnitude and linear separability influence search efficiency.
  • The role of target group contiguity and coherence in multi-digit search remains less explored.

Purpose of the Study:

  • To investigate the impact of target digit arrangement on search speed in multi-digit search tasks.
  • To test the hypothesis that contiguous and coherent target groups enhance search performance.
  • To differentiate the contiguity effect from other potential influencing factors like numerical distance and shape similarity.

Main Methods:

  • Four experiments were conducted involving participants searching for multiple target digits.
  • Search performance was measured under varying conditions of target arrangement, numerical magnitude, parity, linear separability, and shape similarity.
  • Control conditions were implemented to isolate the effect of target contiguity and coherence.

Main Results:

  • Experiment 1 showed targets defined by numerical magnitude were easier to find than those defined by parity.
  • Experiments 2 and 3 demonstrated that contiguous targets were searched faster than separated targets, even when controlling for linear separability, numerical distance, and shape similarity.
  • Experiment 4 confirmed that a coherent target group, without intervening distractors, led to superior search performance.

Conclusions:

  • The contiguity and coherence of a target group on the number line significantly enhance visual search performance.
  • This effect holds true even when controlling for numerical distance, linear separability, and shape similarity.
  • The findings support a unified explanation for multi-digit search efficiency based on target group organization.