Contextual meaning effects on speech-evoked potentials
1973; Academic Press; Volume: 9; Issue: 6 Linguagem: Inglês
10.1016/s0091-6773(73)80136-1
ISSN1557-8267
AutoresWarren S. Brown, James T. Marsh, James C. Smith,
Tópico(s)Motor Control and Adaptation
ResumoResponses to spoken words were recorded from scalp electrodes approximately over Wernicke's and Broca's areas and over homotopic points on the nondominant hemisphere of adult right-handed humans. The waveform of averaged potentials evoked by the same word differed according to its contextual meaning. Thus, responses to the word “fire” differed when in the phrases “sit by the fire” and “ready, aim, fire.” Waveform differences were significantly greater for left hemisphere, than for right hemisphere loci. When context was made ambiguous, as in the phrases “fire is hot” and “fire the gun,” waveform differences disappeared.
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