Fluency and disfluency dissociate FN400 and N400 ERP components during recognition.

Area of Science:

• Cognitive Neuroscience
• Psychology

Background:

• Masked priming affects recognition memory familiarity through fluency manipulation.
• These fluency effects are associated with Event-Related Potential (ERP) activity between 300-500ms post-stimulus.

Purpose of the Study:

• Reanalyze existing datasets to assess baseline period effects on ERPs.
• Investigate the presence of distinct ERP components within the 300-500ms interval.
• Examine the impact of orthographically similar (OS) primes on ERP measures.

Main Methods:

• Reanalysis of multiple previously published datasets.
• Conducting a novel study using orthographically similar primes.
• Analyzing Event-Related Potential (ERP) data, focusing on the 300-500ms time window.

Main Results:

• The baseline period showed minimal impact on ERP measurements.
• Orthographically similar primes did not induce disfluency effects without fluency-inducing primes.
• Evidence from three datasets indicated distinct prime effects and topographies between 300-400ms and 400-500ms.

Conclusions:

• Fluency manipulations impact recognition memory familiarity.
• Distinct ERP components within the 300-500ms interval suggest separate familiarity processes.
• Findings support models differentiating relative and absolute familiarity (Mecklinger & Bader, 2020).