Skilled readers begin processing sub-phonemic features by 80 ms during visual word recognition: evidence from ERPs

Area of Science:

• Cognitive Neuroscience
• Psycholinguistics
• Neuroscience of Language

Background:

• Visual word recognition involves complex processing stages.
• The role of sub-phonemic information in early word processing is debated.
• Understanding the timing of phonological activation is crucial for reading models.

Purpose of the Study:

• To investigate the temporal dynamics of sub-phonemic information activation during visual word recognition.
• To determine if phonological features influence word processing at early stages.
• To examine the time-course of phonological feature congruency effects.

Main Methods:

• Two masked priming experiments using electroencephalography (EEG).
• Participants read target words preceded by nonword primes varying in phonological features (voicing, vowel duration).
• Analysis of event-related potentials (ERPs) to assess brain responses to prime-target congruency.

Main Results:

• Phonological feature congruency modulated brain potentials by 80 ms post-stimulus onset.
• Feature incongruent primes elicited greater negativity compared to congruent primes.
• Congruency effects persisted throughout middle and late stages of word recognition.

Conclusions:

• Skilled readers activate sub-phonemic feature information very early in visual word recognition.
• Phonological representations are utilized across multiple stages of the visual word recognition process.
• These findings support models where early phonological activation is integral to reading.