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Related Experiment Video

Updated: Sep 11, 2025

Decomposing the Variance in Reading Comprehension to Reveal the Unique and Common Effects of Language and Decoding

Decomposing the Variance in Reading Comprehension to Reveal the Unique and Common Effects of Language and Decoding

Published on: October 11, 2018

Reading ability underlies the composite effect for Arabic words.

Rayan Kouzy¹, Zahra Hussain

¹American University of Beirut, Lebanon; École Normal Supérieure - PSL University, France.

|August 14, 2025

Summary

This summary is machine-generated.

Skilled reading of Arabic script, like Latin script, engages holistic processing, as evidenced by the composite effect. This effect requires reading ability, not graphemic complexity or cursive features.

Keywords:

Gestalt composite connectedness expertise orthography reading

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Area of Science:

Cognitive Psychology
Neuroscience
Linguistics

Background:

The composite effect, initially observed for faces, suggests holistic processing in word recognition.
This effect correlates with reading fluency in alphabetic scripts (e.g., Latin) but not non-alphabetic scripts (e.g., Chinese).
Script properties appear to modulate the relationship between the composite effect and reading expertise.

Purpose of the Study:

To investigate the composite effect in Arabic script, a visually complex alphabetic system.
To compare the composite effect in Arabic-English bilinguals and English-only readers.
To determine if script properties like graphemic complexity or cursive features influence the composite effect.

Main Methods:

Participants completed a composite effect task involving judging word halves (aligned/misaligned).
The unattended word half was either congruent or incongruent with the judgment.
The composite effect was measured as a reduction in congruency effect with misalignment.

Main Results:

Arabic-English bilinguals exhibited the composite effect for Arabic words, indicating holistic processing.
English-only readers did not show the composite effect for Arabic words.
Both groups demonstrated the composite effect for English words, with equivalent effect sizes in bilinguals for both scripts.

Conclusions:

The composite effect for Arabic words, similar to Latin script, necessitates reading proficiency in the script.
Graphemic complexity and cursive properties of Arabic script do not impede the composite effect in skilled readers.
Reading expertise is a key factor in observing the composite effect across different scripts.