Electrophysiological difference between mental state decoding and mental state reasoning

Brain Research
Bihua CaoHong Li

Abstract

Previous studies have explored the neural mechanism of Theory of Mind (ToM), but the neural correlates of its two components, mental state decoding and mental state reasoning, remain unclear. In the present study, participants were presented with various photographs, showing an actor looking at 1 of 2 objects, either with a happy or an unhappy expression. They were asked to either decode the emotion of the actor (mental state decoding task), predict which object would be chosen by the actor (mental state reasoning task), or judge at which object the actor was gazing (physical task), while scalp potentials were recorded. Results showed that (1) the reasoning task elicited an earlier N2 peak than the decoding task did over the prefrontal scalp sites; and (2) during the late positive component (240-440 ms), the reasoning task elicited a more positive deflection than the other two tasks did at the prefrontal scalp sites. In addition, neither the decoding task nor the reasoning task has no left/right hemisphere difference. These findings imply that mental state reasoning differs from mental state decoding early (210 ms) after stimulus onset, and that the prefrontal lobe is the neural basis of mental state reasoning.

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Citations

Jul 16, 2013·Psychiatry Research·Andrée M CusiMargaret C McKinnon
Mar 18, 2015·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Feng GaoHong Li
Apr 10, 2020·Social Neuroscience·Yunfei CaoFuhong Li

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