Masked speech priming: neighborhood size matters

Area of Science:

• Cognitive Psychology
• Auditory Perception
• Speech Processing

Background:

• Masked speech priming is a technique used to study unconscious processing of auditory information.
• Previous research has explored various factors influencing masked speech priming, but its robustness under different conditions requires further investigation.
• Understanding the limits of masked priming is crucial for theories of speech perception and lexical access.

Purpose of the Study:

• To investigate the robustness of masked speech priming using a method by Kouider and Dupoux (2005).
• To determine the optimal compression level for spoken stimuli without significant data loss.
• To examine how the number of phonological neighbors affects repetition and form priming in masked speech.

Main Methods:

• Determined the maximum compression level for spoken stimuli without data loss.
• Employed a masked speech priming procedure where a compressed prime preceded an uncompressed target.
• Measured repetition and form priming for target words with high and low phonological neighbor counts.

Main Results:

• Masked speech priming was found to be robust only for word targets with a low number of phonological neighbors.
• The degree of compression significantly impacted the effectiveness of the priming.
• Priming effects were diminished for words with many phonological neighbors.

Conclusions:

• The effectiveness of masked speech priming is constrained by the lexical properties of the target word, specifically its phonological neighborhood density.
• This suggests that lexical competition plays a role in the observed priming effects.
• The findings contribute to understanding the mechanisms underlying spoken word recognition and the limits of unconscious auditory processing.