Losses resulting from deliberate exploration trigger beta oscillations in frontal cortex.

A strong β-ERS bound to anticipated monetary losses ensuing from objectively disadvantageous choices compared with gains, was highly significant if the previous advantageous choice was rightfully rewarded (Tukey HSD, p < 0.001), while after punishment it was at the margin of significance (Tukey HSD, p = 0.04).

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Strong and highly significant suppression of β power relative to baseline was observed during the decision-making period ( Figure 3A ; Supplementary Figure S2 ).

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