Testing limits: ERP evidence for word form preactivation during speeded sentence reading.

Area of Science:

• Cognitive Science
• Neuroscience
• Psycholinguistics

Background:

• Language comprehension is thought to involve preactivation of information at multiple levels.
• Previous research suggested word form prediction during sentence processing has a time limit of 500-700 ms/word, linked to production mechanisms.

Purpose of the Study:

• To test the time constraints on word form preactivation during rapid sentence processing.
• To investigate if context-based expectancies can rapidly facilitate written word processing.

Main Methods:

• Utilized an event-related brain potential (ERP) study with a fast serial visual presentation (SVP) rate of four words/second.
• Replicated the experimental design of DeLong et al. (2019) to examine N400 reductions and late posterior positivity.

Main Results:

• Observed N400 reductions to unpredictable sentence continuations, regardless of semantic or orthographic relatedness.
• Found an increased late posterior positivity in response to orthographic neighbors.
• Results indicate rapid facilitation of written word processing through context-based expectancies.

Conclusions:

• Word form preactivation during language comprehension can occur rapidly, even at normal reading speeds.
• The findings challenge the prediction-by-production comprehension model's proposed time limits for word form preactivation.