New research by Xiaoming Jiang and Marc Pell from the School of Communication Sciences and Disorders, published in the most recent issue of the journal Cortex shows that people make judgments on the confidence of what you say in just 0.2 seconds.
To reach these findings, Jiang and Pell attached 64 electrodes to the heads of volunteers and took electroencephalograms (EEGs) while they listened to recorded statements from actors or other public speakers who were asked to utter statements sounding confident, nearly confident, unconfident or neutral. By monitoring the EEGs, they found that positive peaks in brain activities occurred in all volunteers 200 milliseconds after the start of a clip, no matter its confidence level, with higher peaks for more confident speech. speech.
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March 11, 2015