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Related Experiment Video

Updated: Jun 4, 2026

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

Visual noise disrupts conceptual integration in reading.

Xuefei Gao¹, Elizabeth A L Stine-Morrow, Soo Rim Noh

¹Beckman Institute and Department of Educational Psychology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. gao5@illinois.edu

Psychonomic Bulletin & Review

|February 18, 2011

Summary

Sensory impairment, like visual noise, hinders language comprehension by diverting resources from semantic analysis to word processing. This reduced cognitive capacity impairs learning from text, supporting the Effortfulness Hypothesis.

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Area of Science:

Cognitive Psychology
Neuroscience
Linguistics

Background:

The Effortfulness Hypothesis posits that sensory impairments reduce semantic integration capacity during language comprehension.
Age-related or simulated sensory deficits may impact cognitive processing.

Purpose of the Study:

To empirically test the Effortfulness Hypothesis.
To investigate the impact of sensory challenge on cognitive resource allocation during reading.
To examine the relationship between visual noise, processing levels, and text recall.

Main Methods:

College students participated in a word-by-word reading task.
Participants read passages under three levels of dynamic visual noise (simulated sensory impairment).
Resource allocation to word-level versus semantic-level processing was measured.

Main Results:

A significant interaction was found between processing level and visual noise.
Increased visual noise shifted cognitive resources towards word-level processing.
Attention to semantic analysis decreased as visual noise increased.
Recall of key information declined with greater visual noise.

Conclusions:

Sensory challenges, such as visual noise, impair higher-level cognitive functions in text learning.
The findings support the Effortfulness Hypothesis by demonstrating how sensory impairment affects cognitive resource allocation.
Reduced capacity for semantic integration under sensory challenge has implications for learning and comprehension.