Semantic interference in object naming: an fMRI study of the postcue naming paradigm

Area of Science:

• Cognitive Neuroscience
• Psycholinguistics
• Neuroimaging

Background:

• Semantic interference impacts object naming, with distractor items influencing response times.
• The precise processing level of this effect (pre- vs. post-lexical) remains debated.
• The postcue naming paradigm is a key task for investigating semantic interference.

Purpose of the Study:

• To investigate the neural basis of semantic interference in the postcue naming paradigm using fMRI.
• To determine whether the semantic interference effect occurs at a pre- or post-lexical level.

Main Methods:

• Functional magnetic resonance imaging (fMRI) with a sparse, event-related design.
• Replication of the behavioral postcue naming effect.
• Analysis of neuronal activation patterns.

Main Results:

• The behavioral postcue naming effect was replicated.
• Increased neuronal activation was observed in the right lingual and fusiform gyri.
• These regions are associated with visual object processing and attribute integration.

Conclusions:

• Findings support a post-lexical account of semantic interference in the postcue paradigm.
• The effect likely involves the integration of object attributes in short-term memory.
• fMRI provides crucial insights into the neural mechanisms of speech production.