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Related Experiment Videos

Automatic vs. controlled processes in semantic priming--differentiation by event-related potentials.

Holger Hill1, Marion Strube, Daniela Roesch-Ely

  • 1Universitaet Heidelberg, Psychiatrische Klinik, Heidelberg, Germany. hill@igpp.de

International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology
|May 29, 2002
PubMed
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This study used event-related potentials (ERPs) to examine semantic priming. Results show that spreading activation is faster at short stimulus onset asynchrony (SOA), while controlled processing is independent of SOA.

Area of Science:

  • Cognitive Neuroscience
  • Psycholinguistics

Background:

  • Semantic priming involves automatic (spreading activation) and controlled processes.
  • Behavioral studies suggest stimulus onset asynchrony (SOA) influences these processes.

Purpose of the Study:

  • To investigate the roles of automatic and controlled processes in semantic priming using high-resolution event-related potentials (ERPs).
  • To determine the effect of short (150 ms) and long (700 ms) SOAs on semantic priming.

Main Methods:

  • A word-pseudoword lexical decision task was employed.
  • High-resolution event-related potential (ERP) measures were recorded.
  • Direct, indirect, and unrelated prime-target pairs were used across short and long SOAs.

Main Results:

Related Experiment Videos

  • Increasing semantic distance prolonged reaction times and increased N400 amplitudes, regardless of SOA.
  • A late positive complex (LPC) was sensitive to semantic relatedness only at the short SOA.
  • Early frontal components (P250, N310) were more prominent or exclusive to the short SOA and sensitive to semantic relatedness.

Conclusions:

  • ERP data suggest two distinct processes in semantic priming.
  • Spreading activation facilitates semantic memory access primarily at short SOAs.
  • A controlled, SOA-independent process integrates prime and target words into semantic context.