Not every pseudoword disrupts word recognition: an ERP study.

Area of Science:

• Psycholinguistics
• Cognitive Neuroscience
• Phonetics

Background:

• Lexical access models debate whether all acoustic phonetic information is stored or if redundant features are underspecified.
• Underspecification predicts differential disruption of word recognition based on pseudoword phonology.
• This study investigates asymmetric disruption, focusing on coronal place of articulation as redundant.

Purpose of the Study:

• To test the hypothesis of underspecified phonological information in the mental lexicon.
• To investigate the neurophysiological basis of lexical access and pseudoword processing.
• To examine the role of redundant phonetic features, specifically coronal place of articulation.

Main Methods:

• Event-related potentials (ERPs) were recorded during a lexical decision task.
• Pseudowords were created by altering medial consonants in German disyllabic words.
• The N400 pseudoword effect's temporal characteristics were analyzed, comparing coronal and non-coronal variants.

Main Results:

• Pseudowords elicited enhanced N400 amplitudes compared to real words.
• The N400 effect emerged earlier for pseudowords with non-coronal variants than coronal variants.
• This indicates non-coronal variants were processed as words for a longer duration.

Conclusions:

• Lexical representations of words with medial coronal consonants are initially activated by non-coronal pseudowords.
• Asymmetric neuronal processing suggests an underspecified coronal place of articulation in the mental lexicon.
• This supports models of phonological underspecification in word recognition.