Abstract
Considerable research has focused on overly positive self-perceptions (self-enhancement), and yet little is known about the underlying neural mechanisms. The present study sought to assess the neural correlates of self-enhancement by applying Transcranial Magnetic Stimulation (TMS) to three brain regions. Twelve participants rated their best friend, as well as the self on a set of desirable or undesirable traits while TMS pulses were delivered in a virtual lesion manner. During the baseline condition (Sham TMS), participants produced more desirable and fewer undesirable ratings for themselves as compared to their best friend, showing self-enhancement. Compared to Sham TMS, TMS delivered to the Medial Prefrontal Cortex (MPFC) reduced self-enhancement whereas TMS delivered to the Supplementary Motor Area (SMA) and the precuneus did not. Together, these findings suggest that the MPFC may influence self-enhancement.
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Kwan, V.S.Y., Barrios, V., Ganis, G. et al. Assessing the neural correlates of self-enhancement bias: a transcranial magnetic stimulation study. Exp Brain Res 182, 379–385 (2007). https://doi.org/10.1007/s00221-007-0992-2
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DOI: https://doi.org/10.1007/s00221-007-0992-2