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Related Experiment Video

Updated: May 31, 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

Complex dynamics of semantic memory access in reading.

Giosué Baggio¹, André Fonseca

¹SISSA International School for Advanced Studies, via Bonomea 265, 34136 Trieste, Italy. gbaggio@sissa.it

Journal of the Royal Society, Interface

|July 1, 2011

Summary

This summary is machine-generated.

When encountering unexpected words, the brain shows increased prediction errors before semantic access. Word meaning activation shifts brain activity to more predictable, lower entropy states, revealing language processing dynamics.

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Area of Science:

Neuroscience
Cognitive Science
Psycholinguistics

Background:

Word meaning access is crucial for language comprehension.
Cortical dynamics during semantic processing remain poorly understood.
The transition from sensory input to semantic representation is a key cognitive event.

Purpose of the Study:

To investigate cortical dynamics associated with accessing word meaning.
To examine brain activity changes when encountering contextually unexpected words.
To explore the relationship between semantic access and information processing complexity.

Main Methods:

Electroencephalography (EEG) was recorded while participants read sentences.
Contextually unexpected words were embedded in sentences.
Nonlinear measures of predictability and complexity were applied to EEG data around the N400 effect onset.

Main Results:

Unexpected words elicited larger prediction errors before the N400 onset.
Accessing the meaning of unexpected words led to a phase transition.
Cortical processing shifted to states of lower entropy, becoming more predictable and regular.

Conclusions:

Semantic access involves dynamic shifts in cortical activity.
Unexpected word meaning retrieval alters information processing complexity.
This study provides insights into the neural basis of language comprehension and memory integration.