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Related Experiment Videos

P300 and the word frequency effect.

J Polich1, E Donchin

  • 1Division of Preclinical Neuroscience and Endocrinology, Research Institute of Scripps Clinic, La Jolla, CA 92037.

Electroencephalography and Clinical Neurophysiology
|July 1, 1988
PubMed
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Processing uncommon words requires more cognitive resources, impacting reaction times and brain responses. Word frequency effects emerge early in cognitive processing, influencing how we recognize words.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Psycholinguistics

Background:

  • Word recognition is fundamental to language comprehension.
  • Understanding the influence of word frequency and stimulus probability on cognitive processes is crucial.
  • Event-related potentials (ERPs) offer insights into the timing of cognitive events.

Purpose of the Study:

  • To investigate the impact of word frequency and stimulus probability on word recognition.
  • To differentiate early processing effects from later response-related factors.
  • To explore the neural correlates of word evaluation using ERPs.

Main Methods:

  • Lexical decision task with frequent and infrequent English words.
  • Recording of event-related brain potentials (ERPs) and reaction times (RT).

Related Experiment Videos

  • Analysis of P300 ERP latency to estimate stimulus evaluation time.

    • Main Results:

    • Uncommon words showed longer P300 latencies, reduced amplitude, and slower RTs.
    • Stimulus probability influenced RT but had minimal effect on P300 latency.
    • Findings suggest word frequency effects are early, and uncommon words demand more processing capacity.

    Conclusions:

    • Word frequency impacts early stages of lexical processing.
    • Stimulus probability primarily affects response priming for less processed stimuli.
    • Cognitive evaluation of uncommon words is more resource-intensive.