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On the spatial limits of parallel word processing in reading.

Maša Mlinarič1, Sander A Los2, Joshua Snell2

  • 1Department of Experimental and Applied Psychology, Vrije Universiteit Amsterdam, Van der Boechorststraat 7, 1081 HV, Amsterdam, The Netherlands. m.mlinaric@vu.nl.

Attention, Perception & Psychophysics
|June 5, 2025
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Summary
This summary is machine-generated.

Reading models often suggest parallel word processing. This study found that word recognition is influenced by immediately adjacent words, suggesting a parallel processing limit of approximately three words.

Keywords:
AttentionReadingWord recognition

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Area of Science:

  • Cognitive Psychology
  • Psycholinguistics
  • Reading Science

Background:

  • Reading models propose parallel information processing of multiple words.
  • Existing evidence supports simultaneous processing of foveal and adjacent words.
  • The upper limit of parallel word processing remains debated.

Purpose of the Study:

  • To empirically investigate the extent of parallel word processing during reading.
  • To determine if flanker words beyond immediate adjacency affect target word recognition.
  • To compare findings with existing reading models like E-Z Reader and Glenmore.

Main Methods:

  • A lexical decision flanker task was employed with a central target word and three flankers on each side.
  • Two experiments (offline and online) were conducted with a total of 147 participants.
  • Stimuli were briefly presented to isolate simultaneous processing effects.

Main Results:

  • Flanker effects were observed only for words immediately adjacent to the target word.
  • Orthographic relatedness of more distant flankers did not influence target word recognition.
  • This indicates a limited scope for simultaneous word processing.

Conclusions:

  • Word processing during reading appears to involve approximately three words in parallel.
  • Findings support a more constrained parallel processing scope than some models suggest.
  • Results contribute to refining theories of visual word recognition and reading mechanisms.