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Distractor effects during processing of words under load.

Muriele Brand-D'Abrescia¹, Nili Lavie

¹University College London, London, England. muriele.brand@lpl.univ-aix.fr

Psychonomic Bulletin & Review

|January 31, 2008

Summary

Perceptual load theory explains attention. More letters increase processing load more for nonwords, reducing distraction for nonwords but increasing it for words.

Area of Science:

Cognitive Psychology
Visual Perception
Attention Studies

Background:

The perceptual load model posits that distractor processing depends on task engagement.
Word recognition models indicate enhanced letter perception in words versus nonwords.

Purpose of the Study:

To test if increased letters heighten perceptual load more for nonwords than words.
To investigate the impact of perceptual load on distractor interference for words and nonwords.

Main Methods:

Manipulating the number of letters in stimuli (words vs. nonwords).
Measuring reaction times (RTs) and distractor interference.
Applying principles of the perceptual load model and word recognition.

Main Results:

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Increasing search letters significantly elevated RTs more for nonwords than words.
Distractor interference was reduced for nonwords as letter count increased.
Words, despite efficient processing, showed increased susceptibility to distraction.

Conclusions:

Perceptual load differentially impacts word and nonword processing.
Efficiently processed items (words) may lead to greater distraction under high load.
Findings refine understanding of attention, perception, and reading processes.