Literacy Affects Spoken Language in a Non-Linguistic Task: An ERP Study

Area of Science:

• Cognitive Psychology
• Neuroscience
• Linguistics

Background:

• Orthographic information is known to affect spoken word recognition in laboratory tasks.
• A debate exists on whether orthography influences perception during passive listening, potentially due to task-specific strategies.

Purpose of the Study:

• To investigate if orthographic information influences spoken word perception in a non-linguistic, passive listening task.
• To determine if orthography impacts speech processing automatically, without strategic benefit.

Main Methods:

• An event-related brain potential (ERP) study was conducted.
• Participants performed a simple detection task (Go/NoGo) with spoken words.
• NoGo trials contained orthographically consistent or inconsistent words.

Main Results:

• The consistency effect was replicated: orthographically inconsistent words elicited more negative ERPs than consistent words.
• This effect occurred early (around 300 ms) after word onset.
• The effect persisted despite the non-linguistic nature of the task.

Conclusions:

• Orthography automatically influences spoken word perception, even in passive listening scenarios.
• This suggests orthographic information is processed without requiring lexical or semantic access.
• Results support the theory of orthographic restructuring of phonological representations.