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Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention

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Orthographic and phonological priming in the two cerebral hemispheres.

Michal Lavidor¹, Andrew W Ellis

¹University of York, UK. m.lavidor@hull.ac.uk

|October 30, 2004

Summary

Cerebral hemispheres process written words differently. The right hemisphere emphasizes visual (orthographic) word features, while the left hemisphere prioritizes sound-based (phonological) processing for effective word recognition.

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Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology

Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology

Published on: June 29, 2021

Area of Science:

Cognitive Neuroscience
Psycholinguistics
Neuroscience

Background:

Cerebral hemispheres exhibit specialized functions in cognitive tasks.
Word recognition involves processing both visual (orthographic) and sound-based (phonological) information.
Hemispheric asymmetries in visual word processing are not fully understood.

Purpose of the Study:

To investigate hemispheric differences in processing written words.
To examine the roles of orthographic and phonological information in word recognition across hemispheres.
To determine how visual field (left vs. right) influences lexical decision tasks.

Main Methods:

Two lexical decision experiments were conducted.
Manipulated phonological and orthographic similarity between primes and targets.
Presented stimuli to either the left visual field (LVF) or right visual field (RVF), corresponding to right and left hemisphere processing, respectively.

Main Results:

Orthographic priming was significantly stronger in the left visual field (right hemisphere).
Phonological priming was effective in the right visual field (left hemisphere) irrespective of orthographic similarity.
Left visual field targets showed significant orthographic priming, but not phonological priming.

Conclusions:

Orthographic processing is more characteristic of right hemisphere word recognition.
Phonological processing is more characteristic of left hemisphere word recognition.
Hemispheric specialization exists for different aspects of written word processing.